mavlink: use altitude AMSL in VFR message
merged with NuttX subproject
Merge branch 'master' of https://github.com/PX4/Firmware
Merge branch 'master' into vfr_fix
Reduce ROMFS footprint
Reduce too chatty content, de-allocate non-needed string buffers
fix variable name in rc.uavcan
rename PWM_OUTPUTS to PWM_OUT in all files
rename DO_AUTOCONFIG to AUTOCNF in all files
merged with PX4 master
Merge branch 'master' of https://github.com/PX4/Firmware
added configuration file and mixer file for for caipironha VTOL
adapted and added ROMFS-scripts to support VTOL
extended uORB structs with VTOL specific control topics
log secondary attitude and fixed wing controls for VTOL
adapted attitude controllers to support VTOL
added more mixer geometries and took v-mixer out of multi_tables script
compute secondary attitude with reference frame rotated -90 degress around pitch axis of original reference frame (used for VTOL)
let commander know if VTOL is in fw or in mc mode (important because of external_override)
added VTOL geometries to determine number of motors