Installation

During activation of this plugin it creates 2 pages Products and Checkout with required shortcodes you can change products page to anything but use shortcode. You also can change title of Checkout page but keep url /checkout/ as that is required by plugin. Use the shotcode below to show shopping page in widget or header of your site.
Shortcodes

Use following shortcode to list categories and products.

    //Shortcode
    [my_shop]

    //PHP function for template.
    <?php my_shop(); ?>

Use following shortcode for shopping bag.

    //Shortocode
    [my_bag]

    //PHP function for template.
    <? my_bag(); ?>

Use following shortcode for checkout page.

    //Shortocode
    [my_checkout]

    //PHP function for template.
    <? my_checkout(); ?>