Added tile implementations and altered the makefile to reflect this. Will alter the dungoen generator to implement this (hopefully).
	modified:   Makefile
	new file:   src/World/terrain_defs.cpp
	new file:   src/World/terrain_defs.h
	modified:   src/main.cpp
	deleted:    src/World/World.cpp
	deleted:    src/World/World.h
Merge branch 'master' of https://github.com/schiem/roguelike
	deleted:    src/World/World.cpp
	deleted:    src/World/World.h