gistfile1.txt

$listings = new CPT(
    'listing', array(
        'supports' => array('title', 'editor', 'thumbnail', 'comments', 'author','custom-fields','tags'),
        'menu_icon' => get_template_directory_uri() . '/images/listings_icon.png',
         'labels' => array(
            'name'               => 'Books',
            'singular_name'      => 'Book',
            'add_new'            => 'Add New',
            'add_new_item'       => 'Add New Book',
            'edit_item'          => 'Edit Book',
            'new_item'           => 'New Book',
            'all_items'          => 'All Books',
            'view_item'          => 'View Book',
            'search_items'       => 'Search Books',
            'not_found'          => 'No books found',
            'not_found_in_trash' => 'No books found in Trash',
            'parent_item_colon'  => '',
            'menu_name'          => 'Books'
          )
));