Merge remote-tracking branch 'upstream/master' into ros

Debug/NuttX

Debug/Nuttx.py

Documentation/versionfilter.sh

NuttX

ROMFS/px4fmu_common/init.d/1000_rc_fw_easystar.hil

ROMFS/px4fmu_common/init.d/10015_tbs_discovery

ROMFS/px4fmu_common/init.d/10016_3dr_iris

ROMFS/px4fmu_common/init.d/10017_steadidrone_qu4d

ROMFS/px4fmu_common/init.d/1001_rc_quad_x.hil

ROMFS/px4fmu_common/init.d/1003_rc_quad_+.hil

ROMFS/px4fmu_common/init.d/1004_rc_fw_Rascal110.hil

ROMFS/px4fmu_common/init.d/1005_rc_fw_Malolo1.hil

ROMFS/px4fmu_common/init.d/11001_hexa_cox

ROMFS/px4fmu_common/init.d/12001_octo_cox

ROMFS/px4fmu_common/init.d/3030_io_camflyer

ROMFS/px4fmu_common/init.d/3031_phantom

ROMFS/px4fmu_common/init.d/3032_skywalker_x5

ROMFS/px4fmu_common/init.d/3033_wingwing

ROMFS/px4fmu_common/init.d/3034_fx79

ROMFS/px4fmu_common/init.d/3035_viper