Refactoring WP interface, somewhat brittle and untested at this point - use the master branch if you need stable code right now

Changed waypoint list file format (old files are not compatible anymore!), added file version check, now all waypoint entries should have an entry in the waypoint list file - although qgc does not use/read the orbit_direction and param1 fields. QGC writes the value of orbit into param1 and 0 to orbit_direction (this should and will be changed later!)

add functionalities for change direction of Latitude and Longitude in WaypointGlobalView.h when user editing it

add widget WaypointView to widget WaypointList when create a waypoint with mouse over the map

Major refactoring of the waypoint code. The new design fits the model-view-controller pattern better.