* some ports from glsl
* add ntsc-feather
* Add files via upload
* Rename ntsc/shaders/ntsc-feather.slang to ntsc/shaders/ntsc-simple/ntsc-feather.slang
* Update zfast_crt_composite.slang
1:1 with GLSL
* Update crt-consumer.slang
Removed NTSC as it conflicts with saturation/hue, and can be used as a separate pass anyway. Fixed some mistakes. Massive speed-up from 120 fps to 450 fps on Intel HD630.
* Update crt-gdv-mini-ultra.slang
Removed NTSC, some corrections too.
* Update zfast_crt_composite.slang
* Update fake-crt-geom.slang
To avoid duplicating the whole shader implementation, the needed define
has been split into its own file, and the shader implementation is now
in an include file.
