Fix header of CinematicGui.cs

MCGalaxy/Player/CinematicGui.cs

@@ -1,7 +1,21 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
+/*
+    Copyright 2015 MCGalaxy
+        
+    Dual-licensed under the Educational Community License, Version 2.0 and
+    the GNU General Public License, Version 3 (the "Licenses"); you may
+    not use this file except in compliance with the Licenses. You may
+    obtain a copy of the Licenses at
+    
+    https://opensource.org/license/ecl-2-0/
+    https://www.gnu.org/licenses/gpl-3.0.html
+    
+    Unless required by applicable law or agreed to in writing,
+    software distributed under the Licenses are distributed on an "AS IS"
+    BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+    or implied. See the Licenses for the specific language governing
+    permissions and limitations under the Licenses.
+ */
+
 
 namespace MCGalaxy {
     public class CinematicGui {