initial
Resolved issue with empty sheet generating single <sheetData/> tag
Fixing a conversion bug and adding JSON helper

closes #1
npm version bump
Handling empty typeless cells

@nathanathan presented a case generated from excel, which had the cell:

    <c r="E1" s="1"/>

The schema is incorrect here (advising to treat it as a NaN value).  The right
thing to do is to treat it as `undefined`.
refactoring the csv generation code

XLSX.utils.sheet_to_csv
Handling Google Docs Quirks

closes #2
version bump 0.0.6
Updated README.md
Fixing issue with stray XLSX.utils in xlsx.js

fixes #3
version bump 0.0.7
excel 2013 baseline parsing
LibreOffice xlsx baseline
updating html demo to handle base64 text
Updated README.md

added Tested Environments section
Adding ability to handle numbers and bools
Boolean value parsing
Named Ranges silently ignored

Fixes #4

This is not the final fix -- the named ranges should be parsed
version bump 0.0.10
fixed xml parsing issue with singleton formula