(fix) error with rating inside another ng-repeat directive - dupe

Angular throws a dupe error in ng-repeat directive for rating when inside another ng-repeat directive, changed template to ng-repeat="r in range track by $index" as suggested by angular.

Error: [ngRepeat:dupes] http://errors.angularjs.org/undefined/ngRepeat/dupes?p0=r%20in%20range&p1=object%3A00R

Fixed by adding track by $index to the ng-repeat directive