Basic shapefile support on Balloon

Some time ago I have created a set of classes, using OpenGL primitives, to render efficiently shapefiles in WWJ.
Now, I have spend some time integrating it into Balloon. Here is the result:


The classes has veru good performance but has some important limitation:

• First, it must be used with vertical exaggeration set to zero, that is, no relieve (and it is not much usefull a virtual globe without relive).
  
• Second, there are no filled polygons, polygons are rendered has line loops.

I have made some test using Polyline for lines and SurfacePolygon for polygons but I need more time to test its performance with great amounts of data and integrate it into Balloon.