Testing Done:
Compiled and was able to send an IM. It's not yet using `G_DECLARE_FINAL_TYPE` because `PurpleConversation` is not using `G_DECLARE_*` so it fails if I try to use it. I didn't clean up too much of the code yet, but I tried to get most of the formatting changes we have.
Reviewed at https://reviews.imfreedom.org/r/60/
# SOME DESCRIPTIVE TITLE.
# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
# This file is distributed under the same license as the PACKAGE package.
#
# Translators:
# Copyright (C) Artur Flinta <aflinta@at.kernel.pl>, 2004
# Copyright (C) Krzysztof Foltman <kfoltman@onet.pl>, 2003
# Copyright (C) Paweł Godlewski <pawel@endure.pl>, 2007
# Piotr Drąg <piotrdrag@gmail.com>, 2009
# Copyright (C) Piotr Makowski <pmakowski@aviary.pl>, 2008