Higher dimensional noise functions

[Limeth]

Functions such as perlin5 would be very welcome.

[Razaekel]

5th and 6th dimension noise functions are on my to-do list for this.

[amaranth]

With type level integers it'd be quite easy to do an N dimensional implementation for perlin and simplex at least, probably all the cellular stuff too. They wouldn't be as efficient as the hardcoded ones but you could use specialization for that. Perhaps look in to using typenum or waiting to see what happens with the pi types RFC.

While looking in to this quite some time ago I wrote https://gist.github.com/amaranth/a9ed8fff9a3c029aa743 (in Python) to prove it was possible to generate the perlin gradient tables procedurally although this does not include normalizing them.

[cheako]

This should be merged with N-dimensional noise.