holy diff batman!

Fixes #3021, #5246

OS X support is still maintained in the osx_newbuildsys branch - and
only there.

remove bad FIXME. we don't want to move to gtk.statusicon until they support animations and possibility to build tooltip on the fly

 * 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.

Sorry, it just wasn't maintainable. The problem is the current libotr
API. I'm sick of working around the strange libotr API, sick of getting
HTML messages, sick of losing messages. The final argument for
completely removing it was that we can't get the message ID of a sent
msg anymore - which we need. I tried to work around this as well, but
there seems to be no way to wait for a signal in glib the way I would
need it for the workaround (I wanted to emit a signal in inject_message
and then wait for it after the call to otr_message_fragment_and_send
so the signal can pass us the message id). And the last reason is that
we're heading towards a new release and thus want to stabilize the code,
thus don't have time to work around even more libotr API strangeness.
I will give feedback to the libotr developers, who are currently
planning a new API, so that we can hopefully see OTR support once again
as soon as libotr4 is released.

Kjell already announced that he will continue his branch:
https://code.launchpad.net/~afflux/gajim/otr

I really hope the libotr devs will provide a sane API with libotr4 so
we can integrate OTR support again.

Oh, and I added one more try/except block for OS X.

Someone completely broke it by trying to port it to native GTK.
However, that person didn't only break it with X11 GTK, with
native GTK it wasn't working correctly either.
Fixed it by adding lots of try/except blocks. Someone definitely
deserves to be slaughtered for completely breaking it on OS X…

states. Fix #2755.

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.