when we open a tab that require account name to be displayed (another tab with the same nick is opened), we now redraw first tab too so that account is displayed there too. Fixes #2371

give focus to conversation textview when we insensitive message_textview so that it can receive Ctrl+1,2,3. Fixes #2263

[Santiago Gala] we can now have a different spellchecking language in each chat window. Fixes #2383 and #746.

don't TB when someone changes his nick before having an assigned color (when he talk for the first time)

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