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/
<?xml version="1.0"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"