Add missing copyright header

Povilas Kanapickas · Povilas Kanapickas · commit 93299a9715a2 · 2014-03-30T02:17:09.000+02:00
diff --git a/gadgets/coliru_compiler.js b/gadgets/coliru_compiler.js
@@ -1,3 +1,21 @@
+/*
+    Copyright (C) 2013  Povilas Kanapickas <povilas@radix.lt>
+
+    This file is part of cppreference.com
+
+    This program 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 2 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program.  If not, see http://www.gnu.org/licenses/.
+*/
 
 String.prototype.trim = function () {
     return this.replace(/^\s+|\s+$/g, "");
