Add's more stuff for Xenobiology and slimes

Adds some more options for xenobiologists and slightly reduces the RNG needed for getting slimes.

*When plasma is injected in a slime it will increase it's mutation chance by 5% per 5 units of plasma(To a max of 50%)
*When Inaprovaline is injected it decreases mutation chance by 5% per 5 units(All the way to 0%)
*When slimes are fed solid plasma they will become friendly with you.
*Injecting a grey slime with water will make inaprovaline(5:3 Ratio)