Fix consistency of READMEs with existing packages
- Swap docs/README.rst and README.rst
- move index.rst's content to README.rst
- Also fix the mimetype in setup.py
Replaces !16 (closed)
Migrated from D5360 (view on Phabricator)
Staging instance, all changes can be removed at any time
Replaces !16 (closed)
Migrated from D5360 (view on Phabricator)