Two-by-fours no longer evaporate when unboarding doors and windows.
Stop giant ants and goo pit monsters from spawning hundreds of tiles away

Fixes #861
Suppress warning about va_list mangling in gcc 4.4

Fixes #188
Replace "char" with "signed char" in several places to fix warnings on ARM

Fixes #156
Stop player from building roofs ontop on impassable tiles
Draw player properly when cursor is ontop of them
Make cursor appear of player initially
When deactivating a turret, add_item using x,y, not the z[mondex].x/y of the .erased() mob.
Highlight container tiles when the cursor is placed on them
Make lava count as a fire for crafting purposes

Fixes #801
Make item::burnt int insread of char to prevent overflow

Fixes #1662
Octomerge.
Streamline serialization of burnt item member since it's an int now.