On branch scanline
Changes to be committed:
modified: hlsl/post.fx
Remove scanline effect
new file: hlsl/scanline.fx
Separate scanline effect into its own shader
modified: src/osd/modules/render/d3d/d3dhlsl.cpp
Add scanline effect
modified: src/osd/modules/render/d3d/d3dhlsl.h
Add scanline effect
