Clandestine meth lab!
House 05
Abandoned house
Rv house
it be durgs, yessum
Adds high-end chemistry recipe to extract sugar from wood.
Merge pull request #5773 from Rivet-the-Zombie/aspirin-category-fix

Changes aspirin recipe category to 'drugs' instead of 'chemicals'.
Difficulty tweak.
Merge pull request #5774 from Rivet-the-Zombie/sugar-hydrolysis-from-wood

Adds high-end chemistry recipe to extract sugar from wood.
Fixes vine-happy descent

Apparently I managed to code the vine-descent code such that it gave
everyone vines and sent 'em down anyway if they said no.

(I'd been hoping to have it fall through to the rope.)

Fixed now: it doesn't fall through and doesn't bestow vines.
Adds suffixes

I should've caught this pre-merging.  My bad.
Merge pull request #5777 from KA101/fix-sugar-crash

Adds suffixes
Merge pull request #5775 from KA101/vinesfix

Fixes vine-happy descent
Merge pull request #5762 from John-Candlebury/Some-more-houses

Some more buildings