[director] List snapshots returns more information
[cli] Add snapshots methods to director
[cli] Added snapshot commands
[director] Added snapshot deployment api
[cli] Added take a snapshot for a deployment
[director] Convert timestamp to string when returning the list of snapshots
[director] Added delete all snapshots of a deployment api
[cli] Added command to delete all snapshots of a deployment
[plugin_aws] Remove the snapshot command

Revert commits 50fdb0a and 0e3b408
Fixed typo errors in snapshot commands
Merge pull request #164 from cloudfoundry/snapshots

Add Snapshots commands to Bosh CLI