Lessen Kreist's grind a bit

"Kill 50 maggots" - all for a handful of GP. Not very fun. This lessens the grind and also gives it more texture and overall flavor. There are still some entries missing for Snakes and Mountain Snakes but I would write basically the same for them, oh no, for some reason they have been appearing near/around/in the city! Someone needs to do something before it gets bad!

There is a small known issue here though: getmonsterlink() does not support plurals. This MR also does some rewording and stuff.