Moved Rackspace Cloud DNS APIs to jclouds/jclouds repo.

Conflicts:
	rackspace-clouddns-uk/pom.xml
	rackspace-clouddns-us/pom.xml
	rackspace-clouddns/pom.xml
Merge pull request #79 from rackerlabs/1.6.x

Moved Rackspace Cloud DNS APIs to jclouds/jclouds repo.