#33 Debugging : Texture Atlas Voxelization

- broken on laptop
- dunno why
- added some timer-methods to measure compute shader performance
- Shader/Texture Tools use DebugLog now
- voxelize compute shader vertex buffer access is still wonky
- vertex buffer access of tex atlas could be improved, on the other hand
o_O
- uniform clear color could be improved
- texture atlas voxelization works until first clear dispatch, then
broken