Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

Instead us a Toolbox concept which hangs off of QGCApplication

- Delete all old map code

Also:
- Remove unused code

This was done to support both PX4 and APM flight stack with same code

- Also added new adjustMavlinkMessage support

- New MissionManager
- Plumb MissionManager through MissionEditor
- Mission Editor supports get/set

- Restructured a number of MissionItem properties as well