Board games system

File Release Notes and Changelog

Release Name: 0.11pre0

Notes:
Compilation options:

 --disable-gtk2 : build with gtk1.2. Will work fine, but some features will be missing.
 --disable-sdl : don't look for SDL libraries. SDL is required for sound support.
 --enable-gnome : enable gnome integration. At the moment this is limited to some trivial things like the about dialog.

Changes:
- Lots of UI improvements 
- Usability fixes
- Sound support
- Splash screen, logo
- Games organized into categories
- Support for variants and levels
- Improved documentation
- Optional gnome integration
- Highscores corruption bug fixed