Replace URLs for workflow documentation to appropriate parts of the
OpenStack Project Infrastructure Manual.
Change-Id: Iaf8f913453df0d8139a661dc731bbcfcbb95cc36
Ensure each exported class has a docstring.
Add API to the sphinx docs.
Fix a few formatting issues so the rendered docs look OK.
Change-Id: Ieef7bae3783a084249169fe9b80ab17518eee15f