X-Plane HIL proven both ways, data conversion and controls feedback set up correctly, needs actual HIL flights tests now

Pushed HIL with X-plane to being close to operational. Receiving from X-Plane  implemented, sending to it is prepared. Needs an iteration of onboard SW first

Removed a lot of verbose debug output, added connection indication to main menu bar to improve situational awareness of operator

Fixed a number of bad bugs in the HUD, will need a bit more write / SVG rewrite to make it pretty, but is substantially more accurate and reliable now

Addressed issue #26. Select System, Plugins and System are disabled when neccessary. Removed style-outdoor-dark.css. Moved the other two .css files and Vera.ttf into files/styles.

Erros casused by all of the mergedd branches are now fixed for qgroundcontrol.pro. Working on fixing the errors that now appeare in qgcunittest.pro.

Put libraries into one libs directory under qgroundcontrol. Changed the neccessary files with references to those libraries.