Also use sed to remove now unneeded Vim lines, 2to3 -f ws_comma to fix
some whitespace, and fix some other madness manually.

also use 2to3 -f ws_comma to fix some whitespace

holy diff batman!

* In order to allow the viewing of the roster when we are offline (and some other cool stuffs), with and without roster versioning, now we load roster when RosterWindow is created (at gajim startup). Fixes #3190

* now we load roster from DB when we receive an iq result for the roster without any query
* added a "force" argument to NonBlockingRoster.getRoster(), to force the return of the instance

* added "roster_version" in configuration to save roster version for the account
* added "ver" attribute when gajim requests the roster

Introduce a get_instance factory method for all plugins and other xmpp related classes. This will help us to decouple plugs in order to make them testable.

 * Use namespace instead of attrs={} for addChild
 * Unplug SASL module on auth failure (we currently disconnect so don't really need it)

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.

persistent HTTP connections in BOSH roughly implemented, added hack for openfire incapability of after-SASL-stream-restart-response in BOSH, changed doubles quotes to single

moved bosh code from client_nb.py to bosh.py, replaced debug logging with debug.py by logging in whole xmpppy (debug.py is now unused)

Removed threads and mutexes in connection.py
and gajim.py.
Add resolver through nslookup command, removed
dnspython and pydns (for now).