Add missing CDev init step
SF02/F operational, but not cleaned up / optimized - good enough for first logging
fw_att_control: airspeed is now used correctly
position_estimator_inav: hotfix, change lower dt limit from 5 ms to 2 ms
Merge branch 'master' into beta_mavlink2
Merge branch 'master' into sdlog2_opt
Merge pull request #708 from PX4/stack_reduce

Reduce excessive stack sizes on main OS stacks.
Added laser range finder logging, needs testing
Add range finder to logging
Dropped default gains
Merge pull request #714 from thomasgubler/launchdetection_cleanup

launchdetection: better integration of Block class
Merge pull request #715 from thomasgubler/geofence

Geofence: make better use of Block class for updating parameters
Merge pull request #707 from thomasgubler/fwtrim

Add simple control offset parameter for fw attitude (master)
Merge pull request #673 from PX4/romfs_prune

ROMFS: ignore comments and newlines in startup files, text in mixer files
Merged stack size changes
attitude_estimator_ekf: hotfix, do mag declination rotation matrix initialization
fw posctrl: change 2 functions that return nothing from int to void
Merge pull request #718 from thomasgubler/fw_posctrl_warning

fw posctrl: change 2 functions that return nothing from int to void
mavlink: channel ID allocation fixed
navigator: RTL: set loiter wp instead of normal waypoint in RTL_STATE_DESCEND