Modified the Track and Route airspace shapes to correctly project their geometry onto the globe. This repairs an issue where Track and Route airspace shapes with a large width were too small.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@2563 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Modified ShapeEditor to correctly place width control points for the Orbit, Track and Route airspace shapes.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@2564 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added missing restorable state properties to AbstractAirspace and TrackAirspace. Added a unit test for TrackAirspace restorable state.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@2565 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Updated README.txt to reflect the fix for airspace shape projection to the 3D globe.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk/WorldWind@2566 822214bb-dcf7-4c8d-a767-17ae0fb20d88