Enable position control for Easystar type planes
Bring back proper log conversion copy operation
Work queue in RGB driver without work_cancel()
Fixed some stupid compile errors
Merge pull request #466 from PX4/work_queue_test

RGB Led work queue revision - fixes #464
Decouple navigation from mavlink

- all navigation will use mission_item_s structure for waypoint
representation
- waypoint now in data manager store
Merge branch 'master' into geofence
Merge pull request #468 from jean-m-cyr/geofence

Decouple navigation from mavlink