[modules] baro ets start delay
[modules] airspeed ets start delay
[rotorcraft] motor_mixing: only lower throttle when hitting both min/max saturations

should be a minor improvement for issue #385, but not tested in real flight.
[modules] ets baro/airspeed: cleanup and default delay of 0.2s

- airspeed_ets: use AIRSPEED_ETS_SYNC_SEND instead of SENSOR_SYNC_SEND
- baro_ets: use BARO_ETS_SYNC_SEND instead of BARO_ETS_TELEMETRY
Merge branch 'ets_start_delay'

* ets_start_delay:
  [modules] ets baro/airspeed: cleanup and default delay of 0.2s
  [modules] airspeed ets start delay
  [modules] baro ets start delay

closes #477
[imu] remove old aspirin2 driver
[modules] digital_cam: add DC_POWER_OFF_LED

closes #478
Merge pull request #475 from flixr/motor_mixing_bounds

rotorcraft motor_mixing saturation handling
[extras] Add CHDK script to work with digital_cam module

closes #480