Adding Controller versions v3 and v4. Both versions have two antennas, one for
the RF Amplifier, and the second is the chip antenna. However, they are
different in that the V4 design places them on opposite sides of the board. The
V4 design is also fully placed and routed (and may pass DRC).

The V5 board (next commit) will remove the Amplifier, and keep the chip
antenna. Based on our range tests, we feel that the amplifier is uncessary and
is too risky for the first version of the board