Contributing blurb previously mentioned social coding and Github.
The OpenStack contribution workflow is slightly different. Provide
details on Github, LP, and Gerrit.
Change-Id: Ie5ecd25e5828de611561f37b3acbccc5cf3f0d04
To better facilitate the building and publishing of sphinx
documentation by Jenkins we are moving all openstack projects with
sphinx documentation to a common doc tree structure. Documentation
goes in project/doc/source and build results go in project/doc/build.
Change-Id: I925e687254bac9e06c2c520f4fc35a083e21c4ca