LIBCLOUD-512: Added snapshot lifecycle support and fixture tests to support snapshot listing, creation and deletion.
LIBCLOUD-512: Added snapshot lifecycle support and fixture tests to support snapshot listing, creation and deletion.
Adding condition to handle differences between Rackspace/OpenStack. Changed the response.status comparison to use httplib.NO_CONTENT for ex_delete_snapshot since no data is returned.
Merge branch 'LIBCLOUD-512_Add_OpenStack_Snapshot_Support' of https://github.com/DivvyCloud/libcloud into LIBCLOUD-512_Add_OpenStack_Snapshot_Support

Conflicts:
	libcloud/compute/drivers/openstack.py
	libcloud/test/compute/test_openstack.py
Fix tests, refactor and clean some things up.
Update CHANGES.