Adds a toggle for helm and cloak to each set you create for a character. Mouse over the set to see the checkboxes. Also has a global override in the top right corner on the character frame when viewing sets. Includes a custom color (default red) that is used to highlight items that are part of the set in your bags.
Will add shoulders in Legion if its necessary but I don't know what the future transmog settings are going to be so we'll see...