[usb] prevent start of log when usb storage is running
[log] add option to log raw invariant filter inputs and outputs
[usb] improve usb storage

° when an usb is plugged, wait for an usb-storage cnxion, then
  stop the autopilot to reserve cp for usb-storage thread.
  Yes, we should avoid false detection, so there is two level of detection
  before shutting down autopilot thread.

remove spurious white char @ eol
[rotorcraft] MOTOR_MIXING_MAX_SATURATION_OFFSET defaults to 10%
[modules] fix baro_bmp
[conf] cleanup flash_modes
[math] add SV decomposition and make proper functions
[fix] set lower number of decimal to log (was exceeding  buffer size)
[math] fix compilation with g++ (for nps)

this solution is not really nice and consume a bit more space, if
anyone have a better idea...
[fix] node name for modules' datalink event
Merge remote-tracking branch 'paparazzi' into master_sim_hitl
Donot let motors to spin on while simulating