fixed some more warnings
added alignment macros to some classes
btPersistentManifold from 128 to 16 bytes aligned
prepare command to select collision filter mode (SIM_PARAM_UPDATE_COLLISION_FILTER_MODE)
fix shaders, so that shadowed and non-shadowed are matching
fix registerGraphicsUnitSphereShape API (level of detail), support textured sphere too
add support for textured cube
add start for a Tutorial.cpp