increase Biters Mutation effects in late game

[Dark_star]

my current understanding is that over time as biters get more attacks and pollution they become bigger.
Suggest that game allows for any combination of speed, range effects, size and body armor when time a single biter is spawned depending
attacks and pollution level.
example: Mutation for a smarter or jumping biter would be interesting.

note smarter could be defined as all local biters group around and follow it, its path finding is improved.

[ssilk]

There are definitely more types of natives planned.