nRnd Noise

Added basic simplex noise generation.

testNoise4

[youtube https://www.youtube.com/watch?v=0iQ8DGQVHjY&w=560&h=315]

Thanks to Stefan Gustavson and Cabby Node Games for their explanations. I’m still working on getting it seamless tiling and as fast as possible. Currently using unsafe c# over bitmap byte array. I think some of the noise function can be optimized but at this stage the performance is acceptable and i may add a non realtime render option for high resolution, high octave noise.

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