renamed preloader, fixed some bugs in system. implemented next state in battle.ts
new Tileset for Milestone 3 demo. Lost of fixes such as changing preloader Sprite initializations to match new sprite constructor arguements.
modified map data to include target scene id to call when triggered. fixed animation.ts render() call to match refactored function in GameObject.ts.
small optimization to tilemap.ts to remove various uneeded variables and loop.