Add contrib to py26 and py27 gates

Change-Id: I6e3792bd1fa7076d51321d788d1c272b178339e1
Closes-Bug: #1251380
Add _() to rackspace resource strings

As part of fix to bug #1249217, all the translation strings were
included in _(), but rackspace resources were ignored.
This change is to fix translation strings in rackspace resources.

Change-Id: I2a422746693136636cc137e2e9cc1bd3a7e6bb01
Closes-Bug: #1261545
Remove heat-cli-guide

The heat command line clients are documented now better in the
OpenStack End User Guide:

http://docs.openstack.org/user-guide/content/heat-stack-create.html
http://docs.openstack.org/user-guide/content/heat_client_commands.html

The content here is thus not needed anymore, as the README.rst says:
"This documentation should eventually end up in the OpenStack
documentation repositories `api-site` and `openstack-manuals`."

Change-Id: I297252d7f8eee383ce6252a5db44111630fbe29b
Merge "Add contrib to py26 and py27 gates"
Merge "Add _() to rackspace resource strings"
Merge "Remove heat-cli-guide"