wip: Limits and resellers

* refactoring, limits are working pretty well
* domain admins can now create domains (under control) when the limits extension is enabled

see #105

lib/events.py

@@ -31,6 +31,8 @@ events = [
     "MailboxAliasDeleted",
 
     "DomainAdminCreated",
+    "DomainAdminActions",
+    "DomainAdminDeleted",
 
     "PasswordChange",
     

lib/middleware.py

@@ -34,4 +34,5 @@ class CommonExceptionCatcher(object):
             return _render_error(request, errortpl="error_simple",
                                  user_context=dict(error=str(exception)))
         
-        return ajax_response(request, status="ko", respmsg=str(exception))
+        return ajax_response(request, status="ko", respmsg=str(exception),
+                             norefresh=True)