Changed GHOPComment model to inherit from base model.
All the properties are specific to the GHOPComment model. The GHOPComment
model is also made ID based. Changes changes property from StringProperty
to StringListProperty.
indexes:
# AUTOGENERATED
# This index.yaml is automatically updated whenever the dev_appserver
# detects that a new type of query is run. If you want to manage the
# index.yaml file manually, remove the above marker line (the line
# saying "# AUTOGENERATED"). If you want to manage some indexes
# manually, move them above the marker line. The index.yaml file is
# automatically uploaded to the admin console when you next deploy
# your application using appcfg.py.