Defined library for WorldWind 2.0
Make use of new WorldWind 2.0 library
Removed old WorldWind 1.5.1 library and its natives
A single distributable zip is now created instead of separate atchives per platform
The launch shell scripts do not specify the natives directory anymore (jogl 2.1.5 in WorldWind 2.0 automatically unpacks the right natives)
Increased version number