Rewrote TwitterBot's Twitter stream monitor with the threading and Queue
modules because neither SleekXMPP nor Tweepy seem to play nicely with the
multiprocessing module.  Also fixed a bug in the search term matcher so it
actually works now.

Signed-off-by: The Doctor <drwho@virtadpt.net>
Flipped process threading in the test bot.

Set the event handlers in the base ExocortexBot class to be threading-aware.

Added some threading debugging instrumentation because it's not clear what's
going on in there.

Added some more sanity checking in the TwitterBot class.  Reworked the
thread catching stuff a little.

Signed-off-by: The Doctor <drwho@virtadpt.net>