More support for using the library from more than one activity
1) Beginnings of support for using the library from more than one activity2) rename DistortedLibrary.onCreate() to onSurfaceCreated()3) (rubik) add Cambodia's flag.
Progress (?) with Predeform: give up trying to render the Mesh in Activity1.
Fix MeshBase.join()Only upload Mesh Buffers to GPU when we actually use them.
Correct the Legal notice.
Rename all the classes that are not exported to application to 'Internal'