Fix webapp and sikweb py files pep8

webapp/apps.py

@@ -1,8 +1,13 @@
+"""Webapp app configurations."""
+
 from django.apps import AppConfig
 
 
 class WebappConfig(AppConfig):
+    """Webapp configurations."""
+
     name = 'webapp'
 
     def ready(self):
+        """Import translations."""
         import webapp.translations