UPC-A is complete
Updated the README to be a little more readable
Fixed a small issue with the ISBN/EAN naming in the README

EAN-13 is the barcode format for ISBN.
externalized some things
fixed a few issues
I stand corrected, these codes can have a check done of variable length.
UPC-E Is done
Early morning testing
I stand corrected yet again

The check digit algorithm requires us to use the full UPC-A (as I originally
suspected). However, a bug early on in the develpment of UPC-E caused issues
with it working about 50% of the time, and I tracked it down to this. I know
now that I was originally mistaken.
Added .npmignore

For CI files and tests. Don't need them in the user's final package
Trying something out, potentially
Shoving it to an exp branch instead
Updated the readme with my intention to rewrite
added support for syntax highlighting with github flavored markdown
Started EAN-13