(WIP) : Asynchronous drivers for Swift Storage Driver

* py27 works with gevent
        - monkey patched swiftclient
* py33,py34 work with asyncio and aiohttp
        - new swiftclient using asyncio under deuce/util/client.py
        - doesnt have exception handling yet
* pypy - not working
        - support in the works
        - Need to patch gevent
        - export gevent core loop as pypycore loop