* 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
* Editor: mostly PoC icon effects
* slightly more responsive selection
* resizeable window
game camera still doesn't letterbox properly, will need a bit more work
* letterbox both in editor and in fullscreen
* restore camera rects when returning to editor