Terrain Sampler Guide(s)

[astrsh]

Should serve the same purpose as the old wiki guides:

https://github.com/PolyhedralDev/TerraWiki/blob/master/pages/guides/configuration/My-First-Noise-Equation.md

https://github.com/PolyhedralDev/TerraWiki/blob/master/pages/guides/configuration/List-o'-Noise-Equations.md

https://github.com/PolyhedralDev/TerraWiki/blob/master/pages/guides/configuration/Multi-layered-Noise-Equations.md