.add a d3d10 driver.
.add more utility functions to d3d*_common files.
.add an image transfer/convert function to dxgi_common.
.various refactors / style nits.
- some headers from the windows 10 sdk need to be added to the include
path when targeting mingw :
d3d11.h
d3d11sdklayers.h
d3d12.h
d3d12sdklayers.h
d3d12shader.h
d3dcommon.h
d3dcompiler.h
