license and readme update

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+Creative Commons Attribution-NonCommercial 4.0 International
+
+Creative Commons Corporation ("Creative Commons") is not a law firm and
+does not provide legal services or legal advice. Distribution of
+Creative Commons public licenses does not create a lawyer-client or
+other relationship. Creative Commons makes its licenses and related
+information available on an "as-is" basis. Creative Commons gives no
+warranties regarding its licenses, any material licensed under their
+terms and conditions, or any related information. Creative Commons
+disclaims all liability for damages resulting from their use to the
+fullest extent possible.
+
+Using Creative Commons Public Licenses
+
+Creative Commons public licenses provide a standard set of terms and
+conditions that creators and other rights holders may use to share
+original works of authorship and other material subject to copyright and
+certain other rights specified in the public license below. The
+following considerations are for informational purposes only, are not
+exhaustive, and do not form part of our licenses.
+
+-   Considerations for licensors: Our public licenses are intended for
+    use by those authorized to give the public permission to use
+    material in ways otherwise restricted by copyright and certain other
+    rights. Our licenses are irrevocable. Licensors should read and
+    understand the terms and conditions of the license they choose
+    before applying it. Licensors should also secure all rights
+    necessary before applying our licenses so that the public can reuse
+    the material as expected. Licensors should clearly mark any material
+    not subject to the license. This includes other CC-licensed
+    material, or material used under an exception or limitation to
+    copyright. More considerations for licensors :
+    wiki.creativecommons.org/Considerations_for_licensors
+
+-   Considerations for the public: By using one of our public licenses,
+    a licensor grants the public permission to use the licensed material
+    under specified terms and conditions. If the licensor's permission
+    is not necessary for any reason–for example, because of any
+    applicable exception or limitation to copyright–then that use is not
+    regulated by the license. Our licenses grant only permissions under
+    copyright and certain other rights that a licensor has authority to
+    grant. Use of the licensed material may still be restricted for
+    other reasons, including because others have copyright or other
+    rights in the material. A licensor may make special requests, such
+    as asking that all changes be marked or described. Although not
+    required by our licenses, you are encouraged to respect those
+    requests where reasonable. More considerations for the public :
+    wiki.creativecommons.org/Considerations_for_licensees
+
+Creative Commons Attribution-NonCommercial 4.0 International Public
+License
+
+By exercising the Licensed Rights (defined below), You accept and agree
+to be bound by the terms and conditions of this Creative Commons
+Attribution-NonCommercial 4.0 International Public License ("Public
+License"). To the extent this Public License may be interpreted as a
+contract, You are granted the Licensed Rights in consideration of Your
+acceptance of these terms and conditions, and the Licensor grants You
+such rights in consideration of benefits the Licensor receives from
+making the Licensed Material available under these terms and conditions.
+
+-   Section 1 – Definitions.
+
+    -   a. Adapted Material means material subject to Copyright and
+        Similar Rights that is derived from or based upon the Licensed
+        Material and in which the Licensed Material is translated,
+        altered, arranged, transformed, or otherwise modified in a
+        manner requiring permission under the Copyright and Similar
+        Rights held by the Licensor. For purposes of this Public
+        License, where the Licensed Material is a musical work,
+        performance, or sound recording, Adapted Material is always
+        produced where the Licensed Material is synched in timed
+        relation with a moving image.
+    -   b. Adapter's License means the license You apply to Your
+        Copyright and Similar Rights in Your contributions to Adapted
+        Material in accordance with the terms and conditions of this
+        Public License.
+    -   c. Copyright and Similar Rights means copyright and/or similar
+        rights closely related to copyright including, without
+        limitation, performance, broadcast, sound recording, and Sui
+        Generis Database Rights, without regard to how the rights are
+        labeled or categorized. For purposes of this Public License, the
+        rights specified in Section 2(b)(1)-(2) are not Copyright and
+        Similar Rights.
+    -   d. Effective Technological Measures means those measures that,
+        in the absence of proper authority, may not be circumvented
+        under laws fulfilling obligations under Article 11 of the WIPO
+        Copyright Treaty adopted on December 20, 1996, and/or similar
+        international agreements.
+    -   e. Exceptions and Limitations means fair use, fair dealing,
+        and/or any other exception or limitation to Copyright and
+        Similar Rights that applies to Your use of the Licensed
+        Material.
+    -   f. Licensed Material means the artistic or literary work,
+        database, or other material to which the Licensor applied this
+        Public License.
+    -   g. Licensed Rights means the rights granted to You subject to
+        the terms and conditions of this Public License, which are
+        limited to all Copyright and Similar Rights that apply to Your
+        use of the Licensed Material and that the Licensor has authority
+        to license.
+    -   h. Licensor means the individual(s) or entity(ies) granting
+        rights under this Public License.
+    -   i. NonCommercial means not primarily intended for or directed
+        towards commercial advantage or monetary compensation. For
+        purposes of this Public License, the exchange of the Licensed
+        Material for other material subject to Copyright and Similar
+        Rights by digital file-sharing or similar means is NonCommercial
+        provided there is no payment of monetary compensation in
+        connection with the exchange.
+    -   j. Share means to provide material to the public by any means or
+        process that requires permission under the Licensed Rights, such
+        as reproduction, public display, public performance,
+        distribution, dissemination, communication, or importation, and
+        to make material available to the public including in ways that
+        members of the public may access the material from a place and
+        at a time individually chosen by them.
+    -   k. Sui Generis Database Rights means rights other than copyright
+        resulting from Directive 96/9/EC of the European Parliament and
+        of the Council of 11 March 1996 on the legal protection of
+        databases, as amended and/or succeeded, as well as other
+        essentially equivalent rights anywhere in the world.
+    -   l. You means the individual or entity exercising the Licensed
+        Rights under this Public License. Your has a corresponding
+        meaning.
+
+-   Section 2 – Scope.
+
+    -   a. License grant.
+        -   1. Subject to the terms and conditions of this Public
+            License, the Licensor hereby grants You a worldwide,
+            royalty-free, non-sublicensable, non-exclusive, irrevocable
+            license to exercise the Licensed Rights in the Licensed
+            Material to:
+            -   A. reproduce and Share the Licensed Material, in whole
+                or in part, for NonCommercial purposes only; and
+            -   B. produce, reproduce, and Share Adapted Material for
+                NonCommercial purposes only.
+        -   2. Exceptions and Limitations. For the avoidance of doubt,
+            where Exceptions and Limitations apply to Your use, this
+            Public License does not apply, and You do not need to comply
+            with its terms and conditions.
+        -   3. Term. The term of this Public License is specified in
+            Section 6(a).
+        -   4. Media and formats; technical modifications allowed. The
+            Licensor authorizes You to exercise the Licensed Rights in
+            all media and formats whether now known or hereafter
+            created, and to make technical modifications necessary to do
+            so. The Licensor waives and/or agrees not to assert any
+            right or authority to forbid You from making technical
+            modifications necessary to exercise the Licensed Rights,
+            including technical modifications necessary to circumvent
+            Effective Technological Measures. For purposes of this
+            Public License, simply making modifications authorized by
+            this Section 2(a)(4) never produces Adapted Material.
+        -   5. Downstream recipients.
+            -   A. Offer from the Licensor – Licensed Material. Every
+                recipient of the Licensed Material automatically
+                receives an offer from the Licensor to exercise the
+                Licensed Rights under the terms and conditions of this
+                Public License.
+            -   B. No downstream restrictions. You may not offer or
+                impose any additional or different terms or conditions
+                on, or apply any Effective Technological Measures to,
+                the Licensed Material if doing so restricts exercise of
+                the Licensed Rights by any recipient of the Licensed
+                Material.
+        -   6. No endorsement. Nothing in this Public License
+            constitutes or may be construed as permission to assert or
+            imply that You are, or that Your use of the Licensed
+            Material is, connected with, or sponsored, endorsed, or
+            granted official status by, the Licensor or others
+            designated to receive attribution as provided in Section
+            3(a)(1)(A)(i).
+    -   b. Other rights.
+        -   1. Moral rights, such as the right of integrity, are not
+            licensed under this Public License, nor are publicity,
+            privacy, and/or other similar personality rights; however,
+            to the extent possible, the Licensor waives and/or agrees
+            not to assert any such rights held by the Licensor to the
+            limited extent necessary to allow You to exercise the
+            Licensed Rights, but not otherwise.
+        -   2. Patent and trademark rights are not licensed under this
+            Public License.
+        -   3. To the extent possible, the Licensor waives any right to
+            collect royalties from You for the exercise of the Licensed
+            Rights, whether directly or through a collecting society
+            under any voluntary or waivable statutory or compulsory
+            licensing scheme. In all other cases the Licensor expressly
+            reserves any right to collect such royalties, including when
+            the Licensed Material is used other than for NonCommercial
+            purposes.
+
+-   Section 3 – License Conditions.
+
+    Your exercise of the Licensed Rights is expressly made subject to
+    the following conditions.
+
+    -   a. Attribution.
+        -   1. If You Share the Licensed Material (including in modified
+            form), You must:
+            -   A. retain the following if it is supplied by the
+                Licensor with the Licensed Material:
+                -   i. identification of the creator(s) of the Licensed
+                    Material and any others designated to receive
+                    attribution, in any reasonable manner requested by
+                    the Licensor (including by pseudonym if designated);
+                -   ii. a copyright notice;
+                -   iii. a notice that refers to this Public License;
+                -   iv. a notice that refers to the disclaimer of
+                    warranties;
+                -   v. a URI or hyperlink to the Licensed Material to
+                    the extent reasonably practicable;
+            -   B. indicate if You modified the Licensed Material and
+                retain an indication of any previous modifications; and
+            -   C. indicate the Licensed Material is licensed under this
+                Public License, and include the text of, or the URI or
+                hyperlink to, this Public License.
+        -   2. You may satisfy the conditions in Section 3(a)(1) in any
+            reasonable manner based on the medium, means, and context in
+            which You Share the Licensed Material. For example, it may
+            be reasonable to satisfy the conditions by providing a URI
+            or hyperlink to a resource that includes the required
+            information.
+        -   3. If requested by the Licensor, You must remove any of the
+            information required by Section 3(a)(1)(A) to the extent
+            reasonably practicable.
+        -   4. If You Share Adapted Material You produce, the Adapter's
+            License You apply must not prevent recipients of the Adapted
+            Material from complying with this Public License.
+
+-   Section 4 – Sui Generis Database Rights.
+
+    Where the Licensed Rights include Sui Generis Database Rights that
+    apply to Your use of the Licensed Material:
+
+    -   a. for the avoidance of doubt, Section 2(a)(1) grants You the
+        right to extract, reuse, reproduce, and Share all or a
+        substantial portion of the contents of the database for
+        NonCommercial purposes only;
+    -   b. if You include all or a substantial portion of the database
+        contents in a database in which You have Sui Generis Database
+        Rights, then the database in which You have Sui Generis Database
+        Rights (but not its individual contents) is Adapted Material;
+        and
+    -   c. You must comply with the conditions in Section 3(a) if You
+        Share all or a substantial portion of the contents of the
+        database.
+
+    For the avoidance of doubt, this Section 4 supplements and does not
+    replace Your obligations under this Public License where the
+    Licensed Rights include other Copyright and Similar Rights.
+
+-   Section 5 – Disclaimer of Warranties and Limitation of Liability.
+
+    -   a. Unless otherwise separately undertaken by the Licensor, to
+        the extent possible, the Licensor offers the Licensed Material
+        as-is and as-available, and makes no representations or
+        warranties of any kind concerning the Licensed Material, whether
+        express, implied, statutory, or other. This includes, without
+        limitation, warranties of title, merchantability, fitness for a
+        particular purpose, non-infringement, absence of latent or other
+        defects, accuracy, or the presence or absence of errors, whether
+        or not known or discoverable. Where disclaimers of warranties
+        are not allowed in full or in part, this disclaimer may not
+        apply to You.
+    -   b. To the extent possible, in no event will the Licensor be
+        liable to You on any legal theory (including, without
+        limitation, negligence) or otherwise for any direct, special,
+        indirect, incidental, consequential, punitive, exemplary, or
+        other losses, costs, expenses, or damages arising out of this
+        Public License or use of the Licensed Material, even if the
+        Licensor has been advised of the possibility of such losses,
+        costs, expenses, or damages. Where a limitation of liability is
+        not allowed in full or in part, this limitation may not apply to
+        You.
+    -   c. The disclaimer of warranties and limitation of liability
+        provided above shall be interpreted in a manner that, to the
+        extent possible, most closely approximates an absolute
+        disclaimer and waiver of all liability.
+
+-   Section 6 – Term and Termination.
+
+    -   a. This Public License applies for the term of the Copyright and
+        Similar Rights licensed here. However, if You fail to comply
+        with this Public License, then Your rights under this Public
+        License terminate automatically.
+    -   b. Where Your right to use the Licensed Material has terminated
+        under Section 6(a), it reinstates:
+
+        -   1. automatically as of the date the violation is cured,
+            provided it is cured within 30 days of Your discovery of the
+            violation; or
+        -   2. upon express reinstatement by the Licensor.
+
+        For the avoidance of doubt, this Section 6(b) does not affect
+        any right the Licensor may have to seek remedies for Your
+        violations of this Public License.
+
+    -   c. For the avoidance of doubt, the Licensor may also offer the
+        Licensed Material under separate terms or conditions or stop
+        distributing the Licensed Material at any time; however, doing
+        so will not terminate this Public License.
+    -   d. Sections 1, 5, 6, 7, and 8 survive termination of this Public
+        License.
+
+-   Section 7 – Other Terms and Conditions.
+
+    -   a. The Licensor shall not be bound by any additional or
+        different terms or conditions communicated by You unless
+        expressly agreed.
+    -   b. Any arrangements, understandings, or agreements regarding the
+        Licensed Material not stated herein are separate from and
+        independent of the terms and conditions of this Public License.
+
+-   Section 8 – Interpretation.
+
+    -   a. For the avoidance of doubt, this Public License does not, and
+        shall not be interpreted to, reduce, limit, restrict, or impose
+        conditions on any use of the Licensed Material that could
+        lawfully be made without permission under this Public License.
+    -   b. To the extent possible, if any provision of this Public
+        License is deemed unenforceable, it shall be automatically
+        reformed to the minimum extent necessary to make it enforceable.
+        If the provision cannot be reformed, it shall be severed from
+        this Public License without affecting the enforceability of the
+        remaining terms and conditions.
+    -   c. No term or condition of this Public License will be waived
+        and no failure to comply consented to unless expressly agreed to
+        by the Licensor.
+    -   d. Nothing in this Public License constitutes or may be
+        interpreted as a limitation upon, or waiver of, any privileges
+        and immunities that apply to the Licensor or You, including from
+        the legal processes of any jurisdiction or authority.
+
+Creative Commons is not a party to its public licenses. Notwithstanding,
+Creative Commons may elect to apply one of its public licenses to
+material it publishes and in those instances will be considered the
+"Licensor." The text of the Creative Commons public licenses is
+dedicated to the public domain under the CC0 Public Domain Dedication.
+Except for the limited purpose of indicating that material is shared
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+
+Creative Commons may be contacted at creativecommons.org.