Enhance release procedure

Author: duncanriach

release_procedure.md

@@ -3,11 +3,16 @@
 This is the procedure to follow to finalize a release of
 `tensorflow-determinism`.
 
-## 1. Check Version Number
+## 1. Merge Release Branch
+
+Thoroughly review the release branch (e.g. `r0.3`) and merge it into master.
+Then delete the release branch.
+
+## 2. Check Version Number
 
 Confirm that the version number in `tfdeterminism/version.py` is correct.
 
-## 2. Run Tests
+## 3. Run Tests
 
 Run all the tests and make sure they all pass.
 
@@ -16,13 +21,13 @@ $cd test
 $./all.sh
 ```
 
-## 3. Create Archive
+## 4. Create Archive
 
 ```
 python setup.py sdist
 ```
 
-## 4. Upload to PyPI
+## 5. Upload to PyPI
 
 Upload the archive to the Python Package Index.
 
@@ -43,7 +48,7 @@ repository: https://test.pypi.org/legacy/
 username: <username>
 ```
 
-### 4a. Test PyPI Server
+### 5a. Test PyPI Server
 
 
 ```
@@ -52,15 +57,15 @@ twine upload --repository testpypi dist/tensorflow-determinism-<version>.tar.gz
 
 Review the release online and try installing it.
 
-### 4b. Real PyPI Server
+### 5b. Real PyPI Server
 
 ```
 twine upload --repository pypi dist/tensorflow-determinism-<version>.tar.gz
 ```
 
 Again, review the release online and try installing it.
 
-## 5. Create GitHub Release
+## 6. Create GitHub Release
 
 Finally, on GitHub, create a new release with an appropriate version tag
 (e.g. `v0.1.0`).