Move diagnostics, statistics and maintenance functions from the main app into separate apps

apps/maintenance/api.py

@@ -0,0 +1,12 @@
+from common.utils import reverse_lazy
+
+tools = {}
+
+
+def register_maintenance_links(links, title=None, namespace=None):
+    namespace_dict = tools.get(namespace, {'title': None, 'links': []})
+    namespace_dict['title'] = title
+    for link in links:
+        link.url = getattr(link, 'url', reverse_lazy(link.view))
+        namespace_dict['links'].append(link)
+    tools[namespace] = namespace_dict