Support async use-cases

Since we're supporting both python2 and python3, our async options are very limited. I think we have to either use gevent, use threading, or maybe we can use something from the twisted stack?

Personally, I'd really like to just drop support for python2 (it is the way the ecosystem is moving anyway), and use either the 3.4 syntax of @asyncio.coroutine and yield from or 3.5+ of async def and await. It would give us much more semantic code. Maybe the right answer is just a community-maintained async fork for python 3.4+.

Issue created to separate out discussion from #126.

Inizia leggendo questa discussione insieme all’issue #126 per comprendere il contesto separato e le opzioni proposte per gevent, threading, Twisted e Python 3 asyncio. L’issue non identifica file, test o un obiettivo di implementazione definito; prima di poter iniziare il lavoro sono necessarie una decisione concreta e criteri di accettazione ben delimitati.