Add bandwidth display functionality

Adds a new storage url /bucketBandwidthQuery which will kick off an asynchronous BQ query.  That query will add current month bandwidth usage to a stored BQ table.  

A memcache job is queued up to store all the values in the BQ table into memcache (~200kb)

The storage api has an endpoint to grab a bandwidth value for a particular bucket.  This value will be displayed on the storage modal.

@alex-deaconu please review.