marquee selection component.
##Arity
marquee(
surface [selector for element where selection takes palce],
selectable [selector for selectable items],
selectedClass [class to apply to items as they are selected])
##Using
var marquee = require("marquee");
marquee("body", "> .widget", "lit")
.on("itemsSelected", function(items) {
console.log(items);
});
emits "itemsSelected" event with jquery object containing selected items.