Updating the examples after the 1.7.2 release

Also aligning POMs
JCLOUDS-346: Update Rackspace Cloud Files Examples
Reorder the deps and better comments
Add an example of using jclouds to create a GCE instance (based on a Rackspace example)
Adding an example to delete a server in GCE
Print a single container's metadata instead of all
Update Google examples pom.xml similaraly to the recent updated in Rackspace's one.
Small improvements to the CreateServer GCE example.