The compute commands should be submit before the graphic command. If not, there is a logical error that cause the first frame render error. Since the graphic rendering need to sample the compute shader 's output image.
Move `data/shaders` to `data/shaders/glsl`
Move `data/hlsl` to `data/shaders/hlsl`
Fix up shader paths in the cpp files to point to the new glsl location.
`data/shaders/hlsl/compile.py` still overwrites the glsl .spv files (for
now).
Issue: #723
