This repository contains changes to some core Arduino files that we have found helpful for doing Mod development.

• Our boards.txt creates a LilyPadUSB board that doesn't include code for USB HID. If your sketch needs a little extra room and isn't acting like a USB keyboard or mouse, this will save you 2 KB or so. This needs the arduino-noHID core.
• arduino-noHID is a core that's identical to the arduino core, but has one small change to the USBDesc.h file. Copy hardware/arduino/cores/arduino to hardware/arduino/cores/arduino-noHID and then drop in the new USBDesc.h file in to that folder.
• The twi.c and twi.h files prevent the Wire/I2C library from hanging up everything else when something fails. This commit is waiting to be merged in to the main Arduino branch, but isn't there yet.