hopefully

Implements XEP-0084 and XEP-0153.

This adds an optional dependency on PIL.

When a user isn't in a room, but due to a component bug we receive a
unavailable presence, we were showing a join.

Jonas Wielicki authored Aug 28, 2017 and mathieui committed Aug 31, 2017

This helps with distinguishing highlights and normal messages.

exit the rooms properly, call functions instead of full-blown commands,
do not randomly focus stabs, etc

Fixes #3186.

Eijebong authored Apr 11, 2017 and mathieui committed Jun 27, 2017

The problem is that core.legitimate_disconnect is set to True in the
on_connecting callback which is called before the session_end for some
reasons. on_connecting sets core.legitimate_disconnect back to False so
session_end thinks we've been disconnected and connects automagically
adding a resource and thus duplicating everything.

Moving the reset of legitimate_disconnect to the on_connected callback
fixes the problem.

… it's about time I fixed this