Up to 2.0.0-SNAPSHOT after the 1.8.0 release
Updating project versions to 2.0.0-SNAPSHOT

Follow-up to be8bc22
Prefer Regions to Zones: Rackspace Autoscale
Prefer Regions to Zones: Rackspace Cloud Big Data
Prefer Regions to Zones: OpenStack Marconi
Additional region support in Auto Scale
Prefer Regions to Zones: Rackspace Cloud Queues
More zone reference cleanup