Diversity Binning for Zelda based on path shape

[schrum2]

In the thread for issue #737 there was a proposal from @MBatt1 to based the diversity binning scheme on the shape of the path rather than the specific rooms that are occupied. The idea is that a certain arrangement of rooms is experienced the same by the player no matter where it appears, since the player can't tell the difference between room (0,0) and room (0,1) anyway (if you shift the whole dungeon up one row, it's still the same).

I think this is a good point, and could lead to a good binning scheme, though I'm not sure how hard/easy it will be. Also, I think this new idea should remain separate from issue #737. Let's solve that first, and then return to this new issue later.