I had some time before work ended and thought it might be a good idea to get a better handle of trees and graphs since I haven't had to think about them much si

I had some time before work ended and thought it might be a good idea to get a better handle of trees and graphs since I haven't had to think about them much since university. If anyone has implemented another graphing algorithm that they think is fun, let me know - I'd love to take a crack at it.