New3dapi, remove old code, gles10 renderer, etc.

Quite some changes, but all really simple:
- Renamed NewMaterial to Material
- Moved ObjLoader out of the .old. package
- Added GLES10Shader. While this works well for now, its just intended to migrate things easier.
- DefaultShaderProvider (and therefor ModelBatch) now works also on GLES1.x
- Updated all the tests to use the new 3d api. Note that i might have used some quick solutions, which arent the best solution.
- Commented out ShadowMappingTest and SoftMeshTest which probably need to be recreated.
- Add some convenience methods to the api (ModelInstance constructor by position e.g.)
- Updated gdxinvaders to use the new 3d api, note that the explosions didnt use indices, so i use a quick hack which doesnt look that well.
- Removed everything in the .old.* package

The model-loaders project is still in there, but with errors.