Add Github Issue/Pull request templates and contributing.md

Change-Id: Iadc96ed7a089d7ee4b221d0776ca148dd3c2d5eb
diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
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+<!--
+ Please make sure your issue can be reproduced in the latest version of GWT.
+ If possible, test in latest beta or release candidate (RC) as well.
+-->
+
+**GWT version:** 
+**Browser (with version):** 
+**Operating System:** 
+
+---
+
+##### Description
+<!-- Note: Please use gist.github.com for longer log output -->
+
+
+
+
+
+
+##### Steps to reproduce
+<!-- Note: You can also provide a link to a demo project that reproduces the issue -->
+
+
+
+
+
+
+<!--
+ The following sections are optional and should be deleted if not required.
+ You can also add additional sections if you need to.
+-->
+
+##### Known workarounds
+
+
+
+
+
+
+##### Links to further discussions
+
+
+
+
+
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
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+!!! GWT DOES NOT ACCEPT PULL REQUESTS ON GITHUB !!!
+
+Thank you for creating a patch for GWT. This project uses Gerrit
+to sign CLAs (Contributor License Agreement) and to review
+code contributions. For that reason we can not accept pull requests
+on Github.
+
+
+If you want your patch to be accepted please follow the instructions on
+
+http://www.gwtproject.org/makinggwtbetter.html
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+Contributing guidelines for this project are available at
+
+http://www.gwtproject.org/makinggwtbetter.html
+