Setup helper to avoid manual font instance associations

[adamyanalunas]

It would be much easier if there was a helper that could be called on viewDidLoad (or awakeFromNib or…) that would vacuum up (or be fed) a list of object which should respond when the Dynamic Type value changes, ascertain the current font configuration, and—if there's a Font option available—instantiate and associate the correct Font option for that field.

In addition to the setup helper another "refresh the fonts" helper should be available to take care of pinging the associated Font instances and getting an update font value.