WHAT: This is a fork of "lib_zip.php" from "quixplorer" (v2.3.2) project.
CHANGES: Fix ZipFile class to support empty folders.
WHY: Some project still use old "lib_zip.php" - therefore suffering from same problem.
HOW: Add empty directory entry code translated from "Zip.php" (project "ePub-Export").
LICENSE: MPL 2.0 (from quixplorer)
VERSION: 1.1
LINKS: http://sourceforge.net/projects/quixplorer
https://github.com/mfenner/ePub-Export/blob/master/epub/Zip.php