Major refactoring of the waypoint code. The new design fits the model-view-controller pattern better.

Added MAVLinkLight as an example how to add new protocols, it is currently not an actual implemented protocol

(cherry picked from commit ed0fd7c1)

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

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

[landauf] added new list for letters and updated the pattern list (confidence and count are updated)