ColorBlindness correction shader with adjustable intensity. Can correct for:
* Protanopia (Greatly reduced reds)
* Deuteranopia (Greatly reduced greens)
* Tritanopia (Greatly reduced blues)

The correction algorithm is taken from http://www.daltonize.org/search/label/Daltonize

This shader is released under the CC0 license. Feel free to use, improve and change this shader and consider sharing the modified result.
