Moved some nasty globals from rendering backend into a struct that gets passed around rendering calls
Just realised I was never initialising and quitting SDL properly. How did it work until now? O.o
Can now move up and down through first 5 dungeon levels with up and down keys
Level gen now places stairs up
Now places down stairs too
Moving up and down through levels will now place you at the appropritae stairs
Start player at proper start pos
Merge pull request #58 from wheybags/stairs

Stairs