changed pager to be 0 indicated

    this.forElement = function(elem) {

      var page = elem.getAttribute('data-page');

      page = (page == null)? 1 : parseInt(page, 10);

      page = (page == null)? 0 : parseInt(page, 10);

      this.current_page = page;

      var end = elem.getNumberOfItems();

      end = (end == null)? 1 : parseInt(end, 10);

      end = (end == null)? 0 : parseInt(end, 10);

      this.end = end;

      var per_page = elem.getAttribute('data-per-page');

    this.init = function() {

      var page = this.getAttribute('data-current-page');

      page = (page == null)? 1 : parseInt(page, 10);

      page = (page == null)? 0 : parseInt(page, 10);

      this.current_page = page;

      var end = this.getAttribute('data-last-item');

      end = (end == null)? 1 : parseInt(end, 10);

      end = (end == null)? 0 : parseInt(end, 10);

      this.end = end;

      var per_page = this.getAttribute('data-per-page');

      var per_page = this.per_page;

      var end = this.end;

      var start = (current_page - 1) * per_page + 1;

      var start = (current_page) * per_page + 1;

      var current_end = start + per_page - 1;

      if (current_end > end) {

      var forward_tooltip = this.shadowRoot.querySelector(".forward");

      var base = this;

      var pages = Math.ceil(this.end / this.per_page);

      var pages = Math.ceil((this.end -1) / this.per_page);

      backward_tooltip.onclick = function() {

        var current_page = base.current_page;

        if (current_page > 0 || base.hasAttribute('data-circling')) {

          var new_page = ((current_page + pages) % pages);

          var new_page = ((current_page + pages) % (pages + 1));

          cb(new_page, caller);

          base.current_page = new_page + 1;

          base.current_page = new_page;

          base.renderTitle();

        }

      };

      forward_tooltip.onclick = function() {

        var current_page = base.current_page;

        if (current_page < pages) {

        if (current_page < pages - 1) {

          base.current_page = current_page + 1;

          base.renderTitle();

          cb(current_page, caller);

        } else {

          if (base.hasAttribute('data-circling')) {

            base.current_page = 1;

            base.current_page = 0;

            base.renderTitle();

            cb(0, caller);

          }