Orientation:
- Get accelerometer information from iio-sensor-proxy
Power:
- Add automatic screen brightness support, using iio-sensor-proxy
- Remove critical-battery-action key as it's not used anymore with UPower 1.0
- Fix a crash when reading invalid backlight values
Print notifications:
- Don't show error for job in progress
Wacom:
- Fix possible crash when Bamboo tablet is plugged at login time
- Fix possible double-frees
