blog: strip signpost bridges from Where the Time Goes; feature Ironwood (#498)

the founder's directive applied: the no-signpost-bridges rigor on this one
shipped post as it should have read, publication date untouched. Seven
bridges stripped, each replaced by a statement carrying the content
instead of a promise about the next paragraph. Ironwood promoted to
featured, making it the blog hero by newest-first plus
first-featured-wins; Where the Time Goes keeps its flag and its date.