Added functionality for more in-depth map reading. * is a comment symbol, you can check the map2alt.txt file to see how they're generally formatted now. The way enemies are read in isn't final, either; they'll eventually probably be outsourced to separate methods, with enemyPositions and playerPositions being global level to facilitate that. I'll make the necessary changes at some point in the near future. It's all very rudimentary, but functional.

Also, I removed the now-defunct textureIndex constructors from the inheritance tree.