Squashed 'scripts/upandaway/wicker/' changes from 3787071..ddc70b9

ddc70b9 a little more in the environment
76182b2 a few extensions to predicates.lua

git-subtree-dir: scripts/upandaway/wicker
git-subtree-split: ddc70b94abdb9ee82246e860572817ee1ecd8d71
Included some worldgen things in the wicker env.