Furniture (de)construction, warmth changes

makeshift bed is easier to make (lower difficulty and time) than normal one;
sofa is supposed to be bigger than armchair - now it is made of 12 planks;
sofa and armchair are made of blankets, which are equal to 35 rags, so increased the received amount;
hay gives 0 warmth, tatami mat -500;
hay and tatami mat give 2 sleepiness, added waxed floor and carpet sleepiness too;
redid bed rags requirements/yield.
Future reference: these need declared in mapdata (both the header and the cpp) for player to recognize 'em, IME.  I'm doing it for these PRs but it does hold up the merge.