exlude js/css from spinning

Because we want to make sure we check if there are other things to spin before outputting the page, reading through `the_content` again using a filter (`add_filter('the_content', array(&$this, 'spin_contents'), 99);`) will spin js/css codes that's written within the content. In the case of phpBay, it writes a function `Page_()` which does the pagination submits. 
To fix this, we excluded the js/css codes from spinning.