OpenSimplex Noise ported to D

[Brian Schott via Digitalmars-d-announce]

Some of you may have noticed this article posted to 
/r/programming: 
http://uniblock.tumblr.com/post/97868843242/noise. I ported the 
algorithm to D and uploaded it here: 
https://github.com/Hackerpilot/OpenSimplexNoise-D