Fixed existing service management API implementation and tests to support x-ms-version 2013-06-01.
Update changelog.
Add WinRM options to create_virtual_machine_deployment()
Add options for shutdown, and wrappers for new REST API for starting and stopping multiple roles.
Update change log.
Merge pull request #141 from huguesv/mgmt2013

Existing service management API now targets x-ms-version 2013-06-01