fixed mutex usage in getTotalUpstream and getTotalDownstream and added initialization to connectionStartTime

Made generator --pedantic GCC flag compatible/C89 compatible, fixed a bug where heartbeats where only sent to first link

Started to add support for autopilot firmware updates, added Linux compile instructions, fixed date in mavlink.h to english independent of OS language settings

Major cleanup of MainWindow constructor. All widgets have now the visible property set to false on its constructor

UASWaypointManager now implements the protocol described in http://qgroundcontrol.org/waypoint_protocol

Shortened the signal names being emitted by SlugsMav.cc for the engineer view. Added translation macros tr() for the engineer view plots