Factored out world.
Moved player to the world.
Tied everything together and added randomly moving rats
Made enemies start with 1 health instead of 10 (player still has 10) and added printout in bottom left for player stats.
Added basic combat and tweaked numbers to be more interesting. (Note: Things don't die yet)
Fixed silly mistake where attack and defense were always being set to 1. (max=/=min)
Added logging
Removed NPCs on death
Fixed logging on game over