[Callers] shadow swings

My only observation to add to the shadow swing melee is that while not completely closed to them, i'm cognizant of the several reasons they are a less than optimal choice. Given these drawbacks of the figure, i would not use a shadow swing in a situation with very long sets. If the choreography of the dance is so awesome i feel a need to use it, and the end effects aren't prohibitive, i'd consider running it in a situation with short sets (much as i'd use for a 1s active dance). Why? Because if anyone feels the need to escape their shadow, they can get to an end of the set and either jump out or rumble into another set sooner. I think this offers dancers the best chance to fix a potential issue without singling anyone out or creating a dynamic on the floor more awkward than the choice of a shadow swing dance (albeit an exceptional one!) already did.