Create alternative forms for getter and setter

Create alternative forms for getter and setter
- Inspired bei Alexander Casall (über Twitter)
- http://blog.netopyr.com/2012/02/02/creating-read-only-properties-in-javafx/
- https://github.com/Naoghuman/Dream-Better-Worlds/blob/master/DBW-File-Dream-Api/src/main/java/de/pro/dbw/file/dream/api/DreamModel.java
- Low priority
