Added TestClasses
IObserver und Observable erstellt
Merge branch 'development' of https://github.com/mad73923/de.htwg.se-KaeseKaestchen into development
Merge remote-tracking branch 'origin/master' into development
neue Struktur
weitere Struktur änderungen
neue Struktur, neue klasse Line
new class Line
Merge branch 'development' into developmentJoey

Conflicts:
	de.htwg.se-KaeseKaestchen/src/kaeseKaestchen/KaeseKaestchen.java
	de.htwg.se-KaeseKaestchen/src/kaeseKaestchen/PlayField.java
	de.htwg.se-KaeseKaestchen/src/kaeseKaestchen/Square.java
	de.htwg.se-KaeseKaestchen/src/kaeseKaestchen/UI.java
	de.htwg.se-KaeseKaestchen/src/model/Player.java
	de.htwg.se-KaeseKaestchen/src/tests/KaeseKaestchenTest.java
	de.htwg.se-KaeseKaestchen/src/tests/PlayerTest.java