Some improves to rackspace openstack code

Some improves to the code for the latest Rackspace Openstack API. 

More work necessary to bring the code up to all the latest rackspace features as outlined in

http://docs.rackspace.com/servers/api/v2/cs-devguide/content/ch_preface.html and http://docs.openstack.org/trunk/openstack-compute/developer/openstack-compute-api-1.1/content/index.html

but these are the ones i need for now. I wish i had time to complete the task.