Includes fix for #1853384: Empty Worksheet. PHPExcel creates an empty worksheet by default. Use that worksheet for the first one instead of creating a new one.
Adds administration UI for caching options provided by PHPExcel. Allows admins to select a caching mechanism for better performance, especially usefull when dealing with large datasets.
Module now depends on the Libraries API module: #1884552: Use the Libraries API.
The file phpexcel.api.inc has now completely been removed in favor of phpexcel.inc, as to avoid confusion with phpexcel.api.php (which contains the documentation).
The 3.x branch uses the Libraries API module for including the PHPExcel library.
The import/export functions return constants instead of booleans. This allows developers to easily catch specific errors, instead of checking the watchdog logs.
