Gfx update; assets/towers.png contains images that NEED to be used for graphics, Extra tower table entries have been made for these new towers
forgot to remove files in last commit
PERFECT HEXES.  However, game usage of old sprites was off, so it will still need some changes in the /source lua scripts.
Fixed bug with creating maps.
The void tile is now hidden.
Renamed towerTypes to tileTypes.
Fixed image size in hex-tiles.lua
Reordered map names to match image.
Merge remote-tracking branch 'origin/gfx' into hexGFX

Conflicts:
	assets/tileTypes.lua
	source/game/game.lua
	source/game/map.lua
Deleted old sprites.
Merge branch 'hexGFX'