Figure out levelmap

[anaselmi]

Levelmap should have multiple different ways of storing data and should expose methods/attributes allowing read and write access to these ways of storing data.

[anaselmi]

Development should begin after Puzzler is ported to tcod, as the TDL map is extremely slow.

[anaselmi]

Also, use numpy instead of traditional for loops when modifying/accessing map data, both as a learning exercise and to increase readability/speed.