Remove the spatial tear event

[Emrsnn]

I say change it to just be a small tear you can go around easily, but add that creatures could come out of the tear.

What comes out is random.

variations of questionable quality:
- The tear still goes across the whole map, but one side of the tear gets bees and the other gets wasps. (or other good/bad critters)
- Many small spatial tears that may or may not cause massive inconvenience depending on where they land
- The tear is actually a very wide white hole event
- The tear is actually a very wide black hole event