Fixed many a small thing and finally got a fix for a collision bug that was plaguing me for a couple of versions! If any of you tell me you still see stage clipping, I swear to—

Started implementing a basic Stage class, because I want to have a scroll-able stage, and, eventually, animated background sprites.

Made a couple of tweaks so you have more control of what attacks come out while you're jumping. Before, your attack was determined by the direction of your jump, but I find it more fun when it's determined by the press of the buttons while in mid-air.

Also, implemented an easier way for a character to transition into another next state, which had the fun side effect of making Flash-Kick-into-Dive-Kick now possible. It's fun little side effects like this that make optimizing a joy for me.