add eventlet to timeout long running request

[abemassry]

attempts to fix #11

[jahschwa]

I don't know why yet, but importing eventlet appears to break protocols other than the CLI (tested with xmpp and socket so far). They just hang when connecting, but perhaps more specifically when spawning a new thread? Maybe it changes threading behavior somehow? Will look further today or tomorrow.

[jahschwa]

Seems related to any of these, especially the first one:
https://bugs.python.org/issue13697
http://eventlet.net/doc/patching.html#monkeypatching-the-standard-library
eventlet/eventlet#249

I'm not yet convinced those fully explain this specific issue, but it's possible this wouldn't be usable until I finally get around to switching to python3. Currently very confused as to why CLI isn't affected even though it uses threading as well; red herring?

For what it's worth, xmpp gets stuck here:
https://github.com/TheSchwa/sibyl/blob/master/protocols/sibyl_xmpp.py#L243