events are now saved in an Event class. show in roster/systray options in Advanced Notification Control (for incomming messages) now work.

nick change. Closes #2264.

message windows (i.e., the window appears on the roster desktop rather than the current
desktop).  There may be some more places where this may be wanted, but this hits the
major ones.

dl module commit rocks, just put a comment, do it only in POSIX, pythonify (space after comma and all that stuff)

add an advanced option: restored_message_small tu disable small font in restored messages. Fixes #2048

handle advanced notification for new_message event only (without systray / roster / urgency hint that require a event refactorizatin)
use subprocess module as we depend on python2.4

do not traceback when ft_override_host_to_send is not valid, just ignor and print an error message. Fixes #2231

#2223

[misc] use the domain name of the jid to browse disco instead of hostame. Do not use the custom host. Fixes #2208