[WIP] Add examples for each Method of each Class to /src/examples/java/reference. Use a package and a three file structure with MySprite.java, MyStage.java and MyWindow.java like AnimatedSpriteAddAnimation. Also create suitable files in the documentation for...

[WIP] Add examples for each Method of each Class to /src/examples/java/reference. Use a package and a three file structure with MySprite.java, MyStage.java and MyWindow.java like AnimatedSpriteAddAnimation. Also create suitable files in the documentation for... #4