Initial v1 update

Updating request/responses for volume, types and snapshots. Moving v1
documentation into separate directory.

blueprint api-v1-v2-docs

Change-Id: I4d5337d550123d9b539e40ae6d5ecf086aae7dbb
Adding Cinder v2 docs

Includes updated request/response in json/xml and updated api
references.

Change-Id: I48a33958a6e0a375ac65c706a063336a0347c99d