Open 1.1.x development

The 1.1.x series will be for grizzly bugfix releases.

Change-Id: I041046bb97bf4072f598c91b8a127f4e6bba9f19
Set default branch in .gitreview to stable/grizzly

This allows people to run git-review without any arguments.

Change-Id: Id901d5b948e0419b944e9c7bc12152dc12226b87
Add Environment::OpenStack classifier

Doug had this registered for us:

  http://mail.python.org/pipermail/catalog-sig/2012-October/004634.html

It makes it easier to find all OpenStack packages.

Change-Id: I17ee76616eb11a02a65b7a624f625a207b9e9631