when we edit member / ban / ... list in config room, send to server only the diff, as required by the JEP.

put avatar on the right instead of top of vcard window, but do it the right way (so it is aligned with the left, on the top, and not centered.

use a per-textview var to remember which language is set instead of the global speller_language one.

update vcard info window glade file to make most of labels left-aligned. still lots of work to be done to be HIG

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)