Run pandoc to convert the documentation

This converts all MD formatted docs that were renamed to RST to
preserve git history into actual RST documentation.  Some minor
edits were made but in general the purpose of this patch is to
*only* convert the documentation not rework the documentation.
I do plan on reworking the documentation in further patch sets.

All links were tested and a test rendering is available:

    http://github.com/sdake/kolla

Change-Id: I3df430b14df1ede15407c7f4ba7afcbdc6f9d757