Add better info about licensing

MANIFEST

+include COPYING
 include README.md
 include requirements.txt
 include model_chart_wiki.pdf

django_notify/__init__.py

+# -*- coding: utf-8 -*-
+# This package and all its sub-packages are part of django_notify,
+# except where otherwise stated.
+#
+# django_notify 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.
+#
+# django_notify 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 django_notify. If not, see <http://www.gnu.org/licenses/>.
+
+# Unused feature, atm. everything is bundled with django-wiki
+VERSION = "0.0.3"
+
 from django.contrib.contenttypes.models import ContentType
 from django.db.models import Model
 from django.utils.translation import ugettext as _

setup.py

 # -*- coding: utf-8 -*-
 import os
+from wiki import VERSION
 from setuptools import setup, find_packages
 
 # Utility function to read the README file.
@@ -30,7 +31,7 @@ packages = find_packages()
 
 setup(
     name = "wiki",
-    version = "0.0.15",
+    version = VERSION,
     author = "Benjamin Bach",
     author_email = "benjamin@overtag.dk",
     url = "http://www.django-wiki.org",

wiki/__init__.py

+# -*- coding: utf-8 -*-
+# This package and all its sub-packages are part of django-wiki,
+# except where otherwise stated.
+#
+# django-wiki 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.
+#
+# django-wiki 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 django-wiki. If not, see <http://www.gnu.org/licenses/>.
+
+VERSION = "0.0.15"