WIP simulation of reactors from the Supercritical Minecraft mod.

Majority of reactor code copied from https://github.com/SymmetricDevs/Supercritical

## Misc Commands

Upscaled textures to 32x32 with
`convert fuel_rod_16x.png -filter Point -resize 200% fuel_rod_32x.png`

Tinting fuel rods done with
`convert fuel_rod_base.png -fill '#1d2618' -tint 70 fuel_rod_leu235_dioxide.png`

Coolants just colored squares with
`convert -size 32x32 -fill '#4a94ff' coolant_distilled.png`