Rob-like

Latest changes26/11/2016: Time advances as a reaction to the player's actions. Also, added a first pass on enemies (at the moment, just bats) and improved (yet again) tilemap generation.20/11/2016: Same basic gameplay (which isn't much yet), but the maps are now fully procedural and expanded to a larger size (with player tracking, although that still needs some work). Some of the item generation h…