Update setup-edit.php

Fixed notice Undefined Taxonomies and Post Types
Fixes #1532: find() should default to ascending order for orderby to be consistent with SQL
Fixes #1528: $current_screen is NULL in the case of quick edit, so make sure $current_screen is an object before trying to access any properties.
Get rid of notices when pod_data['object'] is empty
Early exit some loops in PodsMeta for efficiency, props @w3sc
Add [pods-content] shortcode to embed pod page content within a shortcode enabled content area (like in post content of a matching page); [pods-content page="another-pod-page"] is also available
Add 'Custom' option for pod page templates, outputs only the content put into the pod page itself (no header/footer/etc)
Add custom ui option for Advanced Content Types (choose between normal or custom, just like settings pods have)
Update PodsAPI::pod_exists $type variable to check if a pod of a specific type exists
is_pod() now checks $post global to see if the post type is a pod or not
Add language translations, fixes #1548

Translated imported from #1548 which have been synced to/from
http://wp-translate.org/projects/pods-framework/dev/zh-cn/zh_cn
Fix translation file capitalization for zn_CN (related to #1548) part 1
Fix translation file capitalization for zn_CN (related to #1548) part 2
Tweaks for fetch() to handle WP_Error properly without throwing PHP error
Handling of fetch for taxonomy terms before the init action has run and the taxonomies are registered
Pods 2.3.9 Alpha 6
Adding the new $update available for save_post in WP 3.6 just committed in http://core.trac.wordpress.org/ticket/21450
Add actions before/after the meta table for Post Types, and before/after each form field row for Post Types
Fixes #1569
Fix compatibility with the 404 Simple Redirect plugin