MCP3424 via the Wire library

For some reason, I could not get the bit-banged I2C library from JeeLabs to work when I had two channels. It just gave me garbage data or wouldn’t report right.

In the end I changed the code to work with the Wire library. An added benefit is that it uses the PSIX header on the Jeenode so it frees up another port.

A poster, fatlib16, posted up some good code:

http://forums.adafruit.com/viewtopic.php?f=31&t=12269

Works well.