Create our own anonymous user class

This is required so the anonymous user also has a time zone (which is required to render public events.)

calsocial/__init__.py

@@ -76,7 +76,7 @@ class CalendarSocialApp(Flask):
 
     def __init__(self, name, config=None):
         from .models import db, User, Role
-        from .security import security
+        from .security import security, AnonymousUser
 
         Flask.__init__(self, name)
 
@@ -91,7 +91,7 @@ class CalendarSocialApp(Flask):
         babel.localeselector(get_locale)
 
         user_store = SQLAlchemyUserDatastore(db, User, Role)
-        security.init_app(self, datastore=user_store)
+        security.init_app(self, datastore=user_store, anonymous_user=AnonymousUser)
 
         self.context_processor(template_vars)