Update Select2.js

Add New property "DivTemplate" in case of user want to have button to add new item


Example:
    $('#ddl').select2({
            DivTemplate: "<div style='background-color: rgb(171, 168, 168);color: white;font-weight: bold;padding: 0px 3px;cursor: pointer;' onclick='OpenForm()'> + Add New Item</div>"
        });