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
Merge pull request #5 from nathanathan/patch-1

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