Adds release process documentation

Author: Kevin McDonald

RELEASE.md

@@ -0,0 +1,12 @@
+# Release steps
+
+* Update version constants (find them by running `git grep [VERSION_NUMBER]`)
+* Create changelog entry (edit CHANGELOG.md with a one-liner for each closed issue going in the release)
+* Commit and push changes to master with the message: "Version Bump to v[VERSION_NUMBER]"
+* Push tag and PyPi `fab release:[VERSION_NUMBER]`. Before you do this, make sure you have fabric installed (`pip install fabric`) and also make sure that you have pip set up with your PyPi user credentials. The easiest way to do that is to create a file at `~/.pypirc` with the following contents:
+
+ ```
+[server-login]
+username:YOUR_USERNAME
+password:YOUR_PASSWORD
+ ```