Bee work

Some changes to how bee works
(1) Flower type is only red or purple.
(2) Red flowers always show their count
(3) Purple flowers never show their count before run is clicked (they show a ?), and always do after run is clicked.
(4) Flowercombs show as a flowercomb image before run is clicked, then show as their flower with a number counter. Flowercombs are specified by replacing 1 with FC in the map.
(5) We want to have levels where there are both types of flowers.  This is done by replacing the 1 in the map with R or P (for red or purple), to override the default.

Corresponding dashboard PR https://github.com/code-dot-org/dashboard/pull/890
Maybe numberSpriteIndex