Added github template files.

Author: photonstorm

CONTRIBUTING.md .github/CONTRIBUTING.mdCONTRIBUTING.md renamed to .github/CONTRIBUTING.md

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+This Issue is about (delete as applicable)
+
+* A bug in the API
+* An error in the documentation
+* An error in the TypeScript defs
+* An error on the web site
+* A problem with my own code
+
+If this is an API error please provide example code showing what happens, and why you don't believe this is the expected behavior. Issues posted without code take _far_ longer to get resolved, sometimes not ever.
+
+If your Issue contains _any_ form of hostility it will be instantly closed.
+**Be nice or go away.**

.github/ISSUE_TEMPLATE.md

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+**Important:** Pull Requests should _only_ be issued against the `dev` branch. PRs against the master branch will always be closed.
+
+This PR changes (delete as applicable)
+
+* Documentation
+* TypeScript Defs
+* The public-facing API
+* Nothing, it's a bug fix
+
+Describe the changes below:
+