* update icons
* add background loading of sound sequences
- fix bug with preFunction
- remove most of the old preloading code
* update spritesheets for karate man, marching orders
* file explorer chart loading
* update icon for trick on the class
* add way of creating sound sequences in inspector
- actually implement GameAction preFunction
- implement sound scheduling for Jukebox and MultiSound
* Dj School: fix turntable effect being parented to root
* Pajama Party: fix sleep action type not carrying over between transitions