Feature/add gomemcache

* removed Retry loop for unregister (unneeded)
* corrected logic error in Drop
* removed stub for MaxChannels
* added logging for bad keys
* deleted redundant error handlers
* moved duplication pare to storeAppIDArray rather than Fetch (we fetch more than we store)

@bbangert || @kitcambridge r?
In the case of a storage failure, I'd hope that there would be. Storage failures, even intermittent ones, should be logged appropriately. If we are fine with having an unreliable storage system, then I'll degrade this message.