notify_xmpp plugin v0.1

Notification via XMPP/Jabber v0.1
Only tested under Linux so far, because a) no Win machine at hand and b) the xmpp library seems to be missing from windows pip.exe?
Notifier logs on, sends message, logs off. Sometimes it stays logged in, although I've had that with multiple bots and it seems to be a general server thing rather than coding error - doesn't stop Flexget from continuing normally thou.

Very obviously based on notify_osd :)
PyLint has some minor complaints but PEP8 is clean