Zen Cart v1.3.9f 英文版

Zen Cart v139e 主要是补丁，包括以下内容：

* Remove obsolete portions of gzip code
* Fixed problem with redundant code in ot_group_pricing
* BUGSFORUM-320 - Disable GZip compression when serving downloads
* BUGSFORUM-529 - no-op test of $_GET['manufacturers_id'] in product_listing.php
* BUGSFORUM-626 - Fix problems with Breadcrumb:: Product Listing Title :: Buy Now Button
* BUGSFORUM-962 - Deleting a Linked product caused it to delete media/artist details even though master product still exists
* BUGSFORUM-1279 - Line Items not sent to PayPal properly (wasn't fully fixed in v1.3.9e)
* BUGSFORUM-1338 - "Field format error: ORIGID missing" message from PayPal -- when using Back button in admin orders screen
* BUGSFORUM-1339 - Fixed split_page_result.php class "bug"
* BUGSFORUM-1369 - Searching with quotes does not work when clicking next button.
* BUGSFORUM-1412 - fine-tuning of version-info check to fix some windows server issues
* Fixed PHP4-compatibility problem in zc_install (NOTE: You shouldn't be using PHP4 anyway!)