Initial commit
Adding eagle files for RoPi expansion board
Copying over buildsys updates from AVR folder.
Removed 5V <-> 3V3 selector jumper as an ATmega2560 running at 16MHz can only be supplied 5V
Leaving 2nd revision board as-is; will not be ordering 0.2 board.

0.3 is a complete re-routing and layout adjustment. The ATmega has been
moved closer to the bottom left corner. The slot for the camera cable has
been adjusted to the left a bit to better sit squarely over the connector.

The reset switch and passives have been moved over the ethernet connector
adjacent to the FTDI header. The ISP header has also been moved away from
the edge to allow a normal IDC connector to fit.

Pullups have been added to the 5V side of the I2C bus.

The motor controller region has been spread out slightly for easier soldering.

Still need to finish routing the level shifter for the Pi's I2C and UART,
all of the ATmega's UARTS, ISP, motor control signals, and power.
Updated name to RoverPi, moved arduino library into /arduino/RoverPi
Merge branch 'master' of https://github.com/TheBurrito/roverpi