AR 3.1 is not affected. Fixes #175
…on_options Renderer shouldn't be set globally because of mounted apps compatibility, and previous/next_label in Rails should be customized with i18n rather than editing pagination_options.
Because lately it's popular to mount different web frameworks in the same Ruby process (e.g. Sinatra apps beside Rails), a global link renderer option is useless since it would affect all frameworks but it's hardly possible that a single renderer will work in all of these frameworks. See resolution for #176
They are automatically rescued as 404 in production. fixes #152 [ci skip]