Add (for at least RM) a Python API for OSLC Configuration Management (within a project/component)

[barny]

DNG (at least) supports OSLC Configuration Management - there's current implementation to find/select a configuration which works across dng and ETM, but it would be useful to also be able to create (and deliver) changeset, stream, baseline. This will have to handle opt-out for 7.x and hopefully 6.0.6.1 (which are different) - will likely need a refacter/redsign of the Project to be object-oriented, and of the apps that need it to be able to create the appropriate project area type. A demonstrator would be reqif import which: creates baseline before, create changeset for the import, import into the CS, deliver the CS, take a baseline after.