* master:
enum is not a sustainable way to refer to address blocks
Issue 894:update to guava 12.0-rc2
make FutureIterables covariant compatible + update tests
implemented image extension
Issue 895: Adjusting name and description of openstack-nova-ec2 maven module
Issue 895: Correcting placement of rest client binding
Issue 895: Filtering out non-MACHINE images from Nova-EC2 responses (note 2009-04-04 EC2 API didn't support filtering at the machine end)
Exposing contents of DescribeImagesResponseHandler to subclasses
Adjusting openstack-nova-ec2 to handle extended volume status fields (by discarding the extra information)
Exposing fields of CreateVolumeResponseHandler to subclasses