mouseover listing item triggers event, catch in parent view to cause marker to highlight
including pubsub to decouple triggers
pubsub triggers event on mouseover, listing id transmitted to map view
pubsub works, markers change based on mouseOver of active item.  work on mouseout
mouseOver/mouseOut shows active marker.  collection fetch bug; new pins don't become active
work on collection add/fetch bug new pins not highlighting
added close infoWindows on click/drag, work on making new markers responsive to mouseOver