move model files
sample AndroidGameView
GLES2.0 Android implementation
correct GL_CULL_FACE(=2884)
correct byte order at Nio
TextureFile is implemented, but not used and has bugs.
make viewmodel.Shell dir and move related files
add textureFile codes, but not used.
Asset is now .zip file and extract to application data at runtime.
add texture code, but some textures can not be read