SheetJS/js-xlsx — pull request #46 by hmalphettes (2014-02-13 10:17:29+00:00)
Title: Support custom properties

This patch parses the custom properties of an xlsx file.
It returns them as the hash workbook.Custprops

I did not find an excel file with custom properties amongst the existing test files.
So I created a new file and shared it with you by email.

I hope this helps, many thanks for your attention!