trevordixon/excel.js — pull request #26 by yuhei-a (2014-03-06 10:28:47+00:00)
Title: Added support for multiple sheets

We want a multiple sheet support.
I was referring to the d189f48.

A sheet number may now be optionally specified in the arguments.
If specified, xl/worksheets/sheetN.xml will be parsed.
Otherwise, xl/worksheets/sheet1.xml will be parsed. And the return value is the same as ever