Refactor: split code into several django apps (we call them modules).

dav_base/management/commands/disable_module.py

@@ -0,0 +1,18 @@
+from django.conf import settings
+from django.core.management.base import BaseCommand
+
+
+class Command(BaseCommand):
+    help = 'Disable a modular app from django-dav installation.'
+
+    def add_arguments(self, parser):
+        parser.add_argument('module')
+
+    def handle(self, *args, **options):
+        module_name = options['module']
+
+        config = settings.MODULE_CONFIG
+        del config.modules[module_name]
+        config.save()
+
+        self.stdout.write(self.style.SUCCESS('Module \'{}\' disabled.'.format(module_name)))