Added Javadoc comments

src/MainGUI.java

@@ -1,6 +1,13 @@
 import javafx.application.Application;
 import javafx.stage.Stage;
 
+/**
+* 2019-03-10
+* Authors: Harkamal, Vikram, Haris, Siddhant, Nathan
+* MainGUI class, Initializes the entire game and runs the game for user to play
+*
+*/
+
 public class MainGUI extends Application {
     private Player player = new Player();