Adding initial images support for Tier 3 / CenturyLink Cloud
Added VM & Image support.
Better handled a null input filter for listImages.
Added Compute Services.
Removed unused method.
Adding initial network/vlan support for Tier 3 / CenturyLink Cloud.
Added OperationNotSupported exceptions where necessary and minor updates
to pass unit test for unimplemented features.
Added network services.
Adding initial virtual machine support for Tier 3 / CenturyLink Cloud.
Adding initial snapshot support for Tier 3/ CenturyLink Cloud.