Add HTTP Reponse version information to v2 API (and BDD detects) [1/1]

This is an intermediate pull that introduces versioning into the 
response header for the v2 API path.

This will allow BDD to do a better job dealing w/ changes in the
API syntax.

I've started to have BDD detect the content type and version so 
that we can use it in tests.  This will take more work to fully
integrate.


 BDD/bdd.hrl                                        |    5 +++-
 BDD/bdd_restrat.erl                                |   24 ++++++++++++++++----
 BDD/crowbar.erl                                    |    2 ++
 BDD/crowbar_rest.erl                               |    8 ++++++-
 BDD/simple_auth.erl                                |   13 +++++++++--
 .../app/controllers/application_controller.rb      |    7 ++++--
 6 files changed, 49 insertions(+), 10 deletions(-)

Crowbar-Pull-ID: b360f70bed53264d37cda69c5f946406e92e65be

Crowbar-Release: development