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
Parameters list generator
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
Add missing return codes
Merge pull request #477 from amlinux/px4params

Parameters list generator
Move missionlib back under mavlink

- however, rename and move mavlink_missionlib_current_waypoint_changed
function from missionlib to waypoints.
Data manager comments and minor refactoring
Add missing data manager error checks
Merge branch 'master' of https://github.com/PX4/Firmware into geofence
Merge branch 'geofence' of https://github.com/jean-m-cyr/Firmware into geofence
Fix data manager shutdown and add data manager unut test

- make data manager stop command actually work ,
- Add data manager robustness and performance unit test
Fix another comment
Merge pull request #478 from jean-m-cyr/geofence

 Further navigation re-organization