Replace button_directional with button_next_prev
Update the progress_indicator helper API
Update tabular_tooltip to take content as an option
Update callout_editorial example
Update the show_hide_content API
Update the show_hide_trigger template
Update the callout_instructional example
Update show_hide_trigger to include a trigger element and content
Update the tabular_tooltip example
callout_instructional should render HTML
callout_editorial should render HTML