Working on QGraphicsView-based local waypoints interface supporting drag-and-drop, commented code, fixed Google Maps interface, added mouse and SpinBox zoom to HSIWidget, fixed MAV-based coloring and stylesheets - MEGA COMMIT

Fixed Audio output on Linux, works now with systems flite version. Introduced two new alarm/notify sounds

Pushed parameter interface forward, now receiving of onboard params works, working on display and writing

This commit and the previous merge attempts to align my tree with upstream changes. It works for me but apologies in advance if i break anything

Switched from flite for speech on the Mac to built-in MacOSX speech synthesizer. Fixed build system for 64-bit builds (using official SDL.framework, and Qt frameworks).