Docstring cleanup

Minor cleanups for the doc strings in middleware.

Change-Id: I96058ee05645f03b6d9946f4db73b76b0a368d08
Merge "Docstring cleanup"
Merge branch 'master' of https://github.com/openstack/keystonemiddleware.git
delete some files, keep fundemental left, init the repo.
add README
i'm confused
commit
delete
reconstruct dir structure