include license info in all source files

atomstrom.py

@@ -1,6 +1,20 @@
 #!/usr/bin/env python
 
-# TODO: comments and documentation
+# Atomstrom is a small but flexible feed aggregator.
+# Copyright (C) 2013  Ronald Schaten <ronald@schatenseite.de>
+#
+# 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/>.
 
 from models import Base, Feed, Feedinfo, Entry