Changed the font files, since they were converted with only ASCII support. Now they support Czech correctly.
Fixed a bug in SingletonSoundSample which prevented it to play later if it was started with autoplay==false.
Added Esc key code to pixi.keys.js.
Implemented all menu screens. Added menu music.
Still needs a way to reset all animals when switching to gameplay.
Cheats: Esc exits to main menu; 0 speeds up date increasing.