add LICENSE and COPYING files

LICENSE

+    Copyright (C) 2010 Tomasz Śniatowski, Adam Radziszewski
+
+    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>.
+
+    Additional permission under GNU GPL version 3 section 7
+
+    If you modify this Program, or any covered work, by linking or combining
+it with Morfeusz (or a modified version of that library),
+containing parts covered by the terms of the Morfeusz license, the
+licensors of this Program grant you additional permission to convey the
+resulting work.