CDN Management

I've hacked your source to do CDN enabling/disabling of containers.

Two relatively big changes were:

* Changed storageOpts to the more generic requestOpts name.
* Added a "manage" method similar to "storage", but they now wrap a new "call" method so the correct storage/management URL gets called.

There are also tests in place which pass.

Please get back to me if there is anything I need to change.