Added index page helpers
Updated package tag
Added post family helpers
Added sibling checker, tweaked commenting
Should be has_parent, not has_parents.
Reorganized; added section banners
Added early abort if no ancestors are found.
Syntax/typo fixes
Moved is_sibling_of to new misc section
Reverse, not flip, also changed $post to $post_id in applicable places.
Added thumbnail helper
Added ‘show’ option for file adder; display the filename or the title now.