Added GPL license on top of tar.php

plugins/tar/tar.php

@@ -1,4 +1,21 @@
 <?php
+/*
+    Bizou - a (french) KISS php image gallery
+    Copyright (C) 2010  Marc MAURICE
+
+    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 3 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/>.
+*/
 
 # do not enable recursive tars by default
 $TAR_FLAGS = "--no-recursion";