Remove message.default_scope workaround in messages_controller since default_scope has been removed
Add tests for index method on ImagesController and PackagesController which are currently broken by postgres_ext-serializers gem see https://github.com/dockyard/postgres_ext-serializers/issues/21 for details, not aware of any other broke API method due to filter add by cancan
Update gems
As PR for the postgres_ext-serializers gem
is merged so changing github repo path in the gemfile
rebase with Master