Beginnings of MFR compatibility
More work on Cactus Fruit...

Fixed flint tool textures...
Finished Cactus Fruit

-Fruiting cactus are now 4 blocks tall, the top block being a new block
(with a flower on the top!).
-Cactus berry pods randomly grow on the top block of a fruiting cactus.
-Cactus berry pods can be right clicked to be harvested (to prevent dumb
item destroying)
-Using a cactus berry on the top block of a 4-high (and only 4-high!)
cactus will turn it into a fruiting cactus
-Using a cactus berry on a fruiting cactus block will place a new pod on
like before
-Fruiting cactus blocks just drop a cactus