Attempting to fix Berksfile and metadata.rb deps

Still changing glance -> openstack-image and Keystone
-> openstack-identity in places now that those cookbooks
have properly been renamed in the stackforge repos.

Change-Id: I9d4a5062e21597424d1a08ac247b8707fb6d98ff
Removed local patches

These patches make assumptions that are a bit too liberal.
As these cookbooks are more widely used, these should be
moved into a wrapper cookbook.

Change-Id: I5348876712418a520659aab606065e5a5b288d99
markdown cleanups and Description update

Change-Id: I51c4c2f778ab6603e1276b448a3170baafd5fea3