implement adding websites

- implement websites.models.Website
- add migration
- implement websites.views.AddWebsite
- implement websites.forms.AddWebsiteForm
- define URL pattern 'add_website' in websites.urls
- register Website model in websites.admin
- add templates websites/base.html and websites/website_create.html
- add german translation for new strings
- add website URLs to gnuviechadmin.urls
- add websites to INSTALLED_APPS
- add changelog entry

gnuviechadmin/websites/urls.py

@@ -0,0 +1,18 @@
+"""
+This module defines the URL patterns for website related views.
+
+"""
+from __future__ import absolute_import, unicode_literals
+
+from django.conf.urls import patterns, url
+
+from .views import (
+    AddWebsite,
+)
+
+
+urlpatterns = patterns(
+    '',
+    url(r'^(?P<package>\d+)/(?P<domain>[\w0-9.-]+)/create$',
+        AddWebsite.as_view(), name='add_website'),
+)