Update ISSUE_TEMPLATE.md [triage-skip] (#13)

* refactor(github-meta): leverage .github directory

* docs(ISSUE_TEMPLATE): added JSBin template for repros

To help encourage people to reproduce issues, I've made a small JSBin that will load Firebase and
give developers a REPL environment to demonstrate the issue.

* docs(ISSUE_TEMPLATE): restructuring issue template to only display needed info

* fix(docs): fix link to CONTRIBUTING.md

* refactor(ISSUE_TEMPLATE): refactor based on feedback from @samtstern

* fix(ISSUE_TEMPLATE): fix README.md link

ISSUE_TEMPLATE.md → .github/ISSUE_TEMPLATE.md

@@ -1,5 +1,6 @@
-### [READ] Step 1: Are you in the right place?
-
+<!-- Step 1 [READ THIS] -->
+<!--
+Are you in the right place?
   * For issues or feature requests related to __the code in this repository__
     file a Github issue.
     * If this is a __feature request__ make sure the issue title starts with "FR:".
@@ -10,23 +11,30 @@
   * For help troubleshooting your application that does not fall under one
     of the above categories, reach out to the personalized
     [Firebase support channel](https://firebase.google.com/support/).
+-->
+
+<!-- Step 2 -->
 
-### [REQUIRED] Step 2: Describe your environment
+### [REQUIRED] Describe your environment
 
   * Operating System version: _____
   * Firebase SDK version: _____
-  * Library version: _____
   * Firebase Product: _____ (auth, database, storage, etc)
 
-### [REQUIRED] Step 3: Describe the problem
-
-#### Steps to reproduce:
+<!-- Step 3 -->
 
-What happened? How can we make the problem occur?
-This could be a description, log/console output, etc.
+### [REQUIRED] Describe the problem
 
+#### Steps to reproduce:
+<!--
+  What happened? How can we make the problem occur?
+  This could be a description, log/console output, etc.
+-->
 #### Relevant Code:
 
-```
+<!-- Fork this JSBin, provide your own URL, or a simple code snippet below -->
+http://jsbin.com/rinilu/edit?js,console
+
+```javascript
 // TODO(you): code here to reproduce the problem
 ```