Support Noise Functions in Presets

[PersonTheCat]

Terra Terrain Generator includes an amazing expression parser which compiles directly to Java byte code at runtime. This lets users write custom noise functions which look like this:

(x + y / 2) * getNoise(x, y)

Cave Generator the perfect place to implement something similar.

The original behavior is provided by Paralithic, an amazing byte code generator written by @dfsek which is built on top of Byte Buddy (?). It is declared under the GNU public license v3 and so it should be okay to include it as a dependency.

We need to put some thought into this as a community and discuss the ancillary implications of adding it to Cave Generator.

Affected Areas:

• NoiseSettings
• NoiseMapSettings
• NoiseRegionSettings
• Also see PersonTheCat/FastNoise

[PersonTheCat]

A quick update to this issue: Paralithic has been relicensed under MIT. I am now much less concerned about rights issues. I'll try to take a look at this again for 2.0.