[Feature] A couple small genetics effects/abilities and one big one.

[The Grim Sleeper]

Here's that compare link on github:
https://github.com/goonstation/goonstati...-additions

Thank you, I hadn't noticed with the new layout that the original page now has a diff-tab.

On a more serious not: in the code/obj/item/mob_parts.dm, on line 66, the return-type off proc/remove is changed form <null> to the <limb> that is falling off.
That could cause problems, if BYOND was a bit of a strange coding language. Unfortunately, BYOND IS a bit of a strange coding language. On the bright side, if is also very forgiving. I don't think this change is going to break anything, but I haven't tried merging the code and testing it.
And I can't really suggest a good quick fix either.

Other than that, code looks good.