oik_attachment_fields_to_edit() – Add the custom image link using the same method as the Portfolio slideshow plugin which used the method documented here:
oik_enqueue_stylesheets() – Implement ‘wp_enqueue_scripts’ action to enqueue the oik.css and $customCSS stylesheets as required
oik_shortcake_admin_enqueue_scripts() – Implement "admin_enqueue_scripts" actions for oik’s integration with shortcake
