gcloud.storage.connection.Connection.get_bucket takes spurious '*args', '**kw' arguments

[tseaver]

... but ignores them:

https://github.com/GoogleCloudPlatform/gcloud-python/blob/1f2aaf3606802f4f02eeb30e22e1082ef7f4594e/gcloud/storage/connection.py#L258

Likewise the 'create_bucket':

https://github.com/GoogleCloudPlatform/gcloud-python/blob/1f2aaf3606802f4f02eeb30e22e1082ef7f4594e/gcloud/storage/connection.py#L319

and 'delete_bucket':

https://github.com/GoogleCloudPlatform/gcloud-python/blob/1f2aaf3606802f4f02eeb30e22e1082ef7f4594e/gcloud/storage/connection.py#L343