Add a HOWTORELEASE doc

Author: nicoddemus

HOWTORELEASE.rst

@@ -0,0 +1,7 @@
+Here are the steps on how to make a new release.
+
+1. Create a ``release-VERSION`` branch from ``upstream/master``.
+2. Update ``CHANGELOG.rst``.
+3. Push a branch with the changes.
+4. Once all builds pass, push a tag named ``VERSION`` to ``upstream``.
+5. After the deployment is complete, merge the PR.