Added right-click option to select MAV, ensured that waypoints get updated properly on switching MAV

Fully working waypoint interface, thoroughly tested. Active waypoint setting has to be debugged in the simulator, but works fine on real hardware

Cleaned up serial link handling, eliminated double menu entries and safeguarded the link list. Did intentionally not improve the object dependency issue, will work on that on a global scope

Working on better simulation implementation, fixed a bug where the port handle was not fully released

Added not yet working version of logging / log replay, fixed ALL bugs in main window, enabled full persistence in main window and serial link.

Improved line chart, brought back movement on HUD (but still looks somewhat wrong on the dials). Fixed logging for ground time mode

Fixed multi-thread message window bug, mainwindow should not hang any more on message windows from comm threads

Added new options for windows serial port, fixed a number of bugs, added customizing options to instrument widgets

Fixed initialization of Google Earth, works now flawlessly. Further improvements needed on simulation link and Google Earth JavaScript.