begin initial merge of 2.2 features
mw2.2-merged stuff:
* implemented profiles 0-2 (called 'setting' in mwiigui)
* merged in MSP changes including profile switch
* cleaned up rc / aux switch stuff in mw.c based on 2.2 rewrite
* main loop switch for baro/sonar shit adjusted
todo: basically the rest of 2.2 changes (i think some minor imu/gps/baro updates)
baseflight-specific stuff:
* made boxitems transmission dynamic, based on enabled features. no more GPS / camstab trash if it's not enabled
* cleaned up gyro drivers to return scale factor to imu code
* set gyro_lpf now controls every supported gyro - not all take same values, see driver files for allowed ranges, in case of invalid lpf, defaults to something reasonable (around 30-40hz)

maybe couple other things I forgot. this is all 100% experimental, untested, and not even flown. thats why there's  no hex.
merge is still ongoing.

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@294 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61