Added licence header

ellipse_test/Elliptic.cc

@@ -3,6 +3,22 @@
  * \copyright   by Andreas Schmidt
  * 		for questions (aschmidt@mpa-garching.mpg.de)
  *******************************************************************************/
+/**
+ * This file is part of aniso_scale.
+
+    aniso_scale is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    aniso_scale is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with aniso_scale.  If not, see <https://www.gnu.org/licenses/>.
+*/
 #include <iostream>
 #include <fstream>
 #include <stdlib.h>