Updated VersionServiceImpl to add mix:versionable when user attempts to create versions.
Added integration test for FedoraLocks.
  - demonstrating that all mime types can be retrurned
  - demonstrating the need to read the whole response
    in order to have the session close.

Resolves: https://www.pivotaltracker.com/story/show/70597666
Merge pull request #350 from mikedurbin/easier-versioning

Updated VersionServiceImpl to add mix:versionable when user attempts to ...

Resolves: https://www.pivotaltracker.com/story/show/70289498