fixed java11 execution

* use mvn compile exec:java for now to run HomeFlix
* compilation is not possible yet
* see #4

src/main/java/kellerkinder/HomeFlix/application/Main.java

@@ -92,7 +92,7 @@ public class Main extends Application {
 	private void mainWindow(){
 		try {
 			FXMLLoader loader = new FXMLLoader();
-			loader.setLocation(ClassLoader.getSystemResource("fxml/MainWindow.fxml"));
+			loader.setLocation(getClass().getResource("/fxml/MainWindow.fxml"));
 			loader.setController(mainWindowController);
 			pane = (AnchorPane) loader.load();
 			primaryStage.setMinHeight(600.00);