Load mazes from files

[DepthDeluxe]

It would be nice if we could load MicroMouse mazes from files so we can generate special case scenarios that test the algorithm. In addition to saving a full maze in a file, we could have the option of providing a random seed that would produce a desired random maze.

Add API Functions

VirtualMaze::VirtualMaze(char* filename);
VirtualMaze::VirtualMaze(int seed);