Create EEPROM.js

Module to interface with I2C EEPROMs
Update EEPROM.js

Oops, left debug code in.
Create EEPROM.md

Document EEPROM module.
Update EEPROM.md

Formatting fixes...
Update EEPROM.md

Typo
Merge pull request #48 from SpenceKonde/master

Add EEPROM module