Various updates and server running

Updated the the game client a bit by adding the following stuff:
- Added sound to chat messages when playing online
- The Hi-scores list won't pop up anymore when a match is done when playing online
- Minor fluff
- Some small internal changes
Additionally, I also have a test server running now, courtesy of a good friend.
Because we don't have a lot of (test) players (yet), it might be a good idea to plan ahead and ask a friend to join in to play.
Please read the section on playing online to get more information of how it works.
Just update through the in-game updater, or download the new installer to be able to connect to the online server.