Finken model - sensor model implemented
disabled flow telemetrie, fixed model telemetrie
Finken model - implemented api for model modules
Finken model - first simple model logic for testing
fix broken include guard
adding actuators model and actuators setpoint
add setpoint for system based on environment
adding PI-Control for pitch and roll angle

Conflicts:
	sw/airborne/modules/finken_model/finken_model_system.c
fix merge relicts
Merge branch 'system-controller'