Merge branch 'master' of github.com:PX4/Firmware

ROMFS/px4fmu_common/init.d/rc.uavcan

Tools/px4params/srcparser.py

launch/ardrone.launch

launch/iris.launch

launch/multi_uav.launch

launch/multicopter.launch

launch/multicopter_w.launch

launch/multicopter_x.launch

makefiles/nuttx/config_px4fmu-v2_default.mk

makefiles/posix/config_posix_sitl.mk

msg/sensor_accel.msg

msg/sensor_combined.msg

msg/sensor_gyro.msg

msg/vehicle_attitude.msg

src/drivers/device/integrator.h

src/drivers/device/vdev_posix.cpp

src/drivers/frsky_telemetry/frsky_data.c

src/drivers/hott/messages.cpp

src/drivers/l3gd20/l3gd20.cpp

src/drivers/lsm303d/lsm303d.cpp