PX4: don't build lsm303d and l3gd20 on PX4v1
AP_InertialSensor: fixed example build
AP_GPS: fixed example build
AP_Compass: fixed example build
AP_Baro: fixed example build
AP_AHRS: fixed example build
AP_Scheduler: added example sketch
AP_AHRS: fixed example build on APM2
autotest: build some examples for px4-v2