In 1969, during a Boston snowstorm, a crate containing Pablo Picasso's Portrait of a Woman and a Musketeer vanished from Logan Airport. It should have gone to a Milwaukee gallery-but instead ended up in the closet of Bill Rummel, a young forklift operator. What followed was a stranger-than-fiction chain of events: FBI agents on the hunt, whispers of Whitey Bulger's mob, and a daring "reverse h…