Forked from https://github.com/mdymel/superfastblur

Fixed this bug:
mdymel#3

"Just a heads up for the author or anyone else trying to use this code, this line should be:

val += source[ri++] - source[li++];

Currently it is source - dest."


Very fast implementation of Gaussian Blur algorithm in c#. 

Based on an article of Ivan Kuckir:
http://blog.ivank.net/fastest-gaussian-blur.html