[CR/BUFFS!!] Zombie speed cap

Kevin suggested in the IRC that zeds ought to be no more than 50% faster than a typical PC: that would cap at 150.

Capping all such zed-critters led to zolves, zoose, zougars, and zombie dogs all being the same speed: 150.  In order to differentiate a bit, I looked at the ratio between a living and a zombie human, found that
zombies had 70% the speed of their living counterpart, and applied that to zed critters.

That significantly slows the zed critters, effectively buffing players and NPCs.  As such, I'm thinking that my quick & dirty baseline can & should be improved.  Let's talk!