Fix issue 87: Interpolation on attributes doesn't work dynamically
Fix issue 87: Interpolation on attributes doesn't work dynamically

TallyFox/angulartics,iamakimmer/angulartics,martijndejongh/angulartics,cristoferdomingues/angulartics,loggi/angulartics,cwill747/angulartics,angulartics/angulartics,WoodWing/angulartics,Ignigena/angulartics,geordie--/angulartics,jung01080/angulartics,RocketBus/angulartics,abhilashsajeev/angulartics,RideAmigosCorp/angulartics,aheuermann/angulartics,marcin-wosinek/angulartics,dy2288/angulartics,dasmith/angulartics,sampov2/angulartics,mushkab/angulartics,cesarandreu/angulartics,indiegogo/angulartics,trolleycrash/angulartics,haimlit/angulartics