update directive declaration to prevent this error: function($log, $timeout, $window, $injector) is not using explicit annotation and cannot be invoked in strict mode
update directive declaration to prevent this error:
function($log, $timeout, $window, $injector) is not using explicit annotation and cannot be invoked in strict mode

hagai26/ng-walkthrough,ariadnaGomez/ng-walkthrough,hagai26/ng-walkthrough,souly1/ng-walkthrough