Exported disarmed PWM values as IOCTLs
Merge remote-tracking branch 'px4/master' into pwm_ioctls

Conflicts:
	src/drivers/drv_pwm_output.h
Changes to pwm systemcmd, basic functionality there, needs polishing
Some more interface changes, needs testing and cleanup
multirotor_att_control: cleanup, some refactoring
pwm info provides more information, some fixes for setting rate/min/max/disarmed
Adapt startup scripts to new pwm systemcmd interface
Trying to get rid of magic PWM numbers
px4io: major optimization and cleanup
px4io: code style fixed
commander: remove duplicate publishing of vehicle_control_mode and actuator_armed topics, remove unused "counter" field from topics
mavlink_onboard: major optimization, cleanup and minor fixes, WIP
mavlink, mavlink_onboard: bugfixes, code style fixed
sensors: minor optimization, cleanup and refactoring
Moved PWM ramp to systemlib
Small function definition correction
We compile with GCC 4.7.4
Makefile cleanup
Use unsigned for channel counts
Changed pwm_limit interface a bit