(docs) Update README to include steps to release (#185)

README.md

@@ -27,3 +27,15 @@ Contribute
 ----------
 
 If you have great ideas for Auditlog, or if you like to improve something, feel free to fork this repository and/or create a pull request. I'm open for suggestions. If you like to discuss something with me (about Auditlog), please open an issue.
+
+Releases
+--------
+
+1. Make sure all tests on `master` are green.
+2. Create a new branch `vX.Y.Z` from master for that specific release.
+3. Bump versions in `setup.py` and `docs/source/conf.py` (docs have 2 places where the versions need to be changed!)
+4. Pull request `vX.Y.Z` -> `stable`. Merging policy is very strict. This triggers a new release.
+5. Pull request `stable` -> `master`. Now everything is back in sync.
+
+Opening a pull request from `master` directly to `stable` is discouraged as `master` may be updated while the PR is open, thus changing the contents of the release.
+