implement Rackspace Cloud Databases

This adds some very basic DBaaS functionality.  Enough to create and
destroy instances, databases and users.
dbaas: enableRoot method for an instance
Merge pull request #7 from adregner/DBaaS

implement Rackspace Cloud Databases
Cleaning up some syntax issues
Merge branch 'master' of https://github.com/kenperkins/rackspace-openstack

Conflicts:
	lib/cloudservers/server.js
Updating version/changelog