prevent traceback when changing resource of a control when there is no event for the account at all. Fixes #5375

 * remove js from some headers
 * set coding:utf-8 to allow real names in headers

 * Remove some licencing problems
 * To do: same for images
 * See #4200

we have that in all files. To at least lesser the confusion a bit, add
vim tags for that.
Additionally, fix wrong #! in a few files.

 * update documentation and fix indentation
 * don't remove offline contacts from roster when we open the last pending, non chat message event
 * store account and jid per event

Sorry, bct, but I think it is to early to merge that as it completely
breaks. It seems nobody in gajim@conference.gajim.org considers it
usable yet.
I don't know if you got asterix' ok for it and I'm sorry if I reverted
it now although you had his ok, but having broken trunk is very
contra-productive. I think it was just too early to merge.

(Fix #3034) Add ability to minimize groupchats in roster, and to minimize autojoigned bookmarked rooms at launch.

[Mikhail Gusarov and me] Use listeners when an event is added / removed to the events class and use them to update systray.

change resource of incoming event when a resource disconected between the moment we get the message and the moment we read it. see #2657

Fix gajim-remote contact_info
Fix profile_win right click on avatar
Fix a call and a comment
Thanks pyflakes (a program, not a person) for the whole.

More logical meaning of first message for a single message (if no single already in queue for this jid)
Fixed possible bad value of first for pm
Slaped bad bad comments

automake based instalation

removed i18n imports from zeroconf/connection files