Exported disarmed PWM values as IOCTLs
px4io: split io_handle_battery() out from io_handle_status()

ready to add vservo and rssi
uORB: added new servorail_status object

used for VSERVO and RSSI on FMUv2
px4io: added monitoring of vservo and vrssi

publish via servorail_status ORB topic
added error_count field to sensor report structures
perf: added perf_event_count() method

this allows drivers to get an event_count from a perf counter
Merge branch 'master' of github.com:PX4/Firmware into status_monitoring
drivers: report error_count in drivers where possible
Merge branch 'master' of github.com:PX4/Firmware into status_monitoring
easystar startup script: load mixer from sd-card if available
Merge pull request #427 from thomasgubler/sd_mixer

easystar startup script: load mixer from sd-card if available
Hotfix: Improved file test
Merge branch 'master' of github.com:PX4/Firmware
tone_alarm: add GPS warning tone
Better voltage scaling for Iris
Start digital airspeed sensors as default
Hotfix: Ensure that a minimum of 10 degrees pitch is set on takeoff
Merge remote-tracking branch 'px4/master' into pwm_ioctls

Conflicts:
	src/drivers/drv_pwm_output.h
Merge pull request #426 from limhyon/master

PX4Flow, and several tiny things enhanced.
Changes to pwm systemcmd, basic functionality there, needs polishing