working on memecache for entities other than the comments
figured some more stuff out through empirical testing, added a memecache viewer handler to the test harness. next i will be working on the todo items from lines 185 onwards in datastore.py
added offset querying methods to gridpoints class
working on memecache pagination
added back the bylat and bylon methods to pins class
working on memecache algorthim, using a queue to save our place so we don't have to build pages that already exist
added a pagination initializer
added serialize/deserialize methods for data pickling in memcache
finished pagination function