Board description details

[clowrey]

This document from TI I just found has all the differences listed in table 2 on page 2, I thought you might want to add it as not all are identical as your current table shows. like the INA219 has no separate voltage pins vs the INA219 which does. Maybe you can just copy/paste their table?
http://www.ti.com/lit/an/sboa203/sboa203.pdf

Thanks on the detailed library! I may use it on the Arduino Zero / Itsybitsy M4 which are both Atmel SAMD (Atmel + ARM :)

[SV-Zanshin]

Thanks for the link. I've modified both the main readme.md and the main wiki page to include a link to the additional documentation.