qingy 0.8.0

- Made qingy GUI multithreaded. Now every graphic element on screen has
one or more threads that handle draws and input events independently.
This greatly reduces code complexity as well as improving maintainability.
Also, it paves the road for adding some more elements to qingy GUI,
like an 'X profile' combo, or a 'host to connect to' one.
- Fixed bug that made main qingy process hang if its gui terminated abnormally,
when DirectFB is shutting down and gets an invalid address somewhere inside
its bowels. This made qingy lock up using 100% CPU power. Fortunately this
happened in text mode so that it was possible to kill the process and go on...
- Fixed "kill qingy" keybinding behaviour. Now it actually
quits qingy, instead of locking up your machine ;-).