Make package copyright more manageable

This puts the copyright notice extenral to main project file and
friendlier to eyes and version control management (fewer chances of
merge conflicts). It also takes care of an annoying problem where
Visual Studio would re-encoding the `&morelinq#169;` to the copyright
symbol whenever the project file would be opened in the IDE and
which would show up as artificial changes ready for commit to the
version control repository.

.gitignore

@@ -16,7 +16,6 @@
 x64/
 x86/
 build/
-bld/
 [Bb]in/
 [Oo]bj/
 

MoreLinq.Test/MoreLinq.Test.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-  <Import Project="..\dotnet-netfx-mono.props" />
+  <Import Project="..\bld\DotNetSdkMono.props" />
 
   <PropertyGroup>
     <AssemblyTitle>MoreLinq.Test</AssemblyTitle>

MoreLinq/MoreLinq.csproj

@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-  <Import Project="..\dotnet-netfx-mono.props" />
+  <Import Project="..\bld\DotNetSdkMono.props" />
+  <Import Project="..\bld\Copyright.props" />
 
   <PropertyGroup>
     <Title>MoreLINQ</Title>
@@ -99,7 +100,7 @@
         - ZipShortest
     </Description>
     <Description>$([System.Text.RegularExpressions.Regex]::Replace($(Description), `\s+`, ` `).Trim().Replace(` - `, `, `).Replace(`:,`, `:`))</Description>
-    <Copyright>&#169; 2008 Jonathan Skeet. Portions &#169; 2009 Atif Aziz, Chris Ammerman, Konrad Rudolph. Portions &#169; 2010 Johannes Rudolph, Leopold Bushkin. Portions &#169; 2015 Felipe Sateler, &#8220;sholland&#8221;. Portions &#169; 2016 Andreas Gullberg Larsen, Leandro F. Vieira (leandromoh). Portions &#169; 2017 Jonas Nyrup (jnyrup). Portions &#169; Microsoft. All rights reserved.</Copyright>
+    <Copyright>$([System.Text.RegularExpressions.Regex]::Replace($(Copyright), `\s+`, ` `).Trim())</Copyright>
     <AssemblyTitle>MoreLINQ</AssemblyTitle>
     <NeutralLanguage>en-US</NeutralLanguage>
     <VersionPrefix>3.0.0</VersionPrefix>

bld/Copyright.props

@@ -0,0 +1,13 @@
+<Project>
+  <PropertyGroup>
+    <Copyright>
+        &#169; 2008 Jonathan Skeet.
+        Portions &#169; 2009 Atif Aziz, Chris Ammerman, Konrad Rudolph.
+        Portions &#169; 2010 Johannes Rudolph, Leopold Bushkin.
+        Portions &#169; 2015 Felipe Sateler, &#8220;sholland&#8221;.
+        Portions &#169; 2016 Andreas Gullberg Larsen, Leandro F. Vieira (leandromoh).
+        Portions &#169; 2017 Jonas Nyrup (jnyrup).
+        Portions &#169; Microsoft. All rights reserved.
+    </Copyright>
+  </PropertyGroup>
+</Project>