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.

YEEHAY! First working version of Google Earth direct interface - initialization is not perfect yet, current the user first has to ignore a number of script errors.