* use bootstrap style for buttons.
 * change for table and form style.
 + add new bootstrap image.
 - delete useless file.
 * resolve conflict for pager's class.
 * change sql file for msn.
 * adjust style for category's manage.html.php.
 * change iframe's style for footer.admin.html.php.
 * change iframe's style for footer.
 * merge the code from pms.
 - remove the front and admin css.
 * adjust the style of request-browse.
 * change for searchform's style.
 * change for the function of togglesearch.
 * adjust style.css.
 * adjust style of request-view.
 * adjust style for product-manage.
 * add btn class for button.
 * adjust style.