But make this behavior configurable. Updates #647

* Updated onDisconnected method to fire disconnected event. Issue #648

* Updated docs/CHANGES.md

Also, don't call scrollDown unnecessarily in showStatusMessages

so that we don't scroll down while the user is reading messages further up.

This lets variable interpolation still work (if Jed is loaded)

When sending a MUC message, fullname should be the user's nick in the chat room.

I'm afraid it might get very expensive.

Until now, new days were only indicated for messages received on different days
*after* the day's messages.

when auto_reconnect = false

The filter was being hidden if the roster was not big enough to require a
scrollbar, but the roster might not be big enough because the roster is
actually being applied.

Solves a weird problem I've encountered with PubSub and Prosody, whereby a
returned HTTP response is not received by the browser. Underlying cause is
still unknown, but is BOSH related and it appears to be that the HTTP request
being responded to by Prosody is no longer open/valid.

* feature add catalan language

* feature add catalan language

In the process I had to refactor some methods which required the mock
connection of tests to be changed as well.

Remove interval handler and the user activity handler.
Make sure the connection is reset when logging out.
Also removed the reconnectTimeout, instead debounce the reconnect method by 1 second.