Better maze creation algorithm

[DepthDeluxe]

We want to be able to test non-simply-connected mazes (i.e. mazes that have an island in them) because that is most likely going to happen in competition.

[DepthDeluxe]

Since I am using a modification of Prim's MST, I could allow for a certain percentage of back edges to be put into the graph. I'll need to check back with the implementation and see how this would work using this code base which isn't focused around a graph paradigm.

Another option could be finding a repository of MicroMouse mazes and saving them into a file.