Rad damage changes

Added coefficient to scale speed of rads. Currently it's 10x slower than it was.

Added humans going bald on high rads levels.
Added a chance to get sick burn on highest rad level.
Replaced mutations (turning deaf/blind is unfun, and slowing rads would raise the chance of it happening) with a a chance of small genetic damage.
Yeah, I think I'll do that, since humans seem to certain-balding currently.
Blasted 's' in end of things, bane of my existence along with articles.