Update the VERSION identifier
Edit 'src/rfdoc/version.py' in the source repo and commit.
Tag the source repo and push it
hg tag N.N && hg push
Create a source .tar.gz distribution
python setup.py sdist --formats=gztar
Verify that the content looks correct:
tar -ztvf dist/robotframework-rfdoc-N.N.tar.gz
Upload the source distribution to PyPi
python setup.py sdist upload
Update the 'News' section at https://code.google.com/p/rfdoc to mention about the release with short description of what was done.
Done via https://code.google.com/p/rfdoc/admin.