created a basic party and began work on showing party status information in the party menu
added fullscreen support
moved party-making logic into a separate function, since it is only needed when starting a new game
fleshed out the intro scene to show credit slides before the game starts. you can press space to skip a slide, or escape to skip all slides
added a keyboardinputlayer to handle the repeated code needed to convert a keyboard keydown/keyup into a function call.
added support for interchangable items in the menu
stripped out my bad decisions on equipping items and moved the logic to live within SRPGGame and Character, along with some helper functionality inside Item to determine what kind of equipment it is.