[sim] add dummy gpio function/macros in sim
[MF_DAQ] add power control with a gpio
[MF_DAQ] improve data logging (including MD5 and GPS)
[sim] send broadcasted messages to all aircraft

Previously, the broadcasted messages was no sent to the aircraft with the same ID.
I suppose this was to not send ACINFO to himself, but this should be
filtered by datalink parser in the end.
It also solves the rc_datalink issue in sim.
[sim] enabled downlink via ivy by default and rename var
[supervision] remove obsolete perl gui
[stm32] possibility to disable caret diagnostics on gcc 4.8