3.0 paging client

I added a flag for client side paging
<code>
self.gridOptions = {
    ....
        pagingPageSizes: [10, 25, 50, 100],
        pagingPageSize: 25,
        pagingCurrentPage: 1,
        enableServerSidePaging : false
        columnDefs: [
              ....]
      }
</code>