Lots of changes:
* Some code cleanups
* Start using @brief, @params and @return in doxygen comments
Still a lot of the comments do not and need updating.
* Start work on an interface between Decibel and the desktop environment's PIM system (for contacts).
* Get ever closer to actually be able to initiate a connection from Decibel:-) This requires some contacts, which is why I started on that interface in the first place.