Better defaults for RC SCALE
L1 control diagram illustrating corner case
Covered corner case in L1 controller not adressed so far in existing concepts
Prevent warnings by data conversion
Merge branch 'master' of github.com:PX4/Firmware
Merge branch 'master' into geofence
Further navigation re-organization

- Remove need for data manager handles.
- Run data manager IO under separate execution thread.
- Move waypoint and missionlib code to navigator module