Added fog-of-war to the game.

From a design standpoint, I wasn't really sure what I wanted from a roguelike or DFlike in general. After playing a little minecraft and DCSS today I came to the conclusion that exploration is interesting, and having the whole map revealed though convenient, is pretty boring. This is probably intuitive to anyone reading this, but it's not really something I thought about until now. Anyways, have a screenshot:

Also, added saving of turns (will be used for weather, tides, day/night cycles, and seasons.)

Still need to add saving of HP, inventories, and now the fow map.

Also need to add a more functional fow (walls should block vision).