Knight

A series of puzzles that a humble knight can traverse.

Was inspired by the game Bloxorz and after watching a Numberphile video on 
the Trapped Knight sequence explained by Neil Sloane.

Game is unfinished because too much time was spent on the math stuff.

Please let me know of all bugs or if something does not work!

Changelog:
- level select stays in range
- inf1 now actually works
- improving inf1 level's out of bounds bugs