Big, big, major commit this time:

Big, big, major commit this time:

* Separation of GUI and Core finished, including synchronized global data in Global *global
* Speaking of which, the Quassel class has been renamed to Global, way cooler!
* TCP/IP between GUI and Core works, though the server port is still hardcoded to 4242
* The build system now handles any combination of "mono", "core" and "gui" for cmake's -DBUILD
* A lot of fixes and stuff
* More to come, but the basic framework should be stabilizing now.