add Dijkstra
Merge branch 'master' of https://github.com/JanaWengenroth/GKA1

Conflicts:
	Project/src/GKA/Controler/MainControler.java
	Project/src/GKA/Controler/MouseControler/MouseDijkstraHandler.java
	Project/src/GKA/GUI/GKADijkstraButton.java
	Project/src/GKA/GUI/GKAGraphMenuPanel.java
	Project/src/GKA/Graph/GKAGraph.java