Fast indexing

[Yozzaxia1311]

deep.execute will sort queues by keys instead of iterating from min to max indexes. This is no longer a performance issue:

deep.queue(-10000, print, "Large negative!")
deep.queue(1, print, "Normal")
deep.queue(10000, print, "Large positive!")
deep.queue(-20.32471, print, "Wild card!")
deep.execute()