Changed screw terminals to 3.5mm pitch instead of 2.54mm

These screw terminals are much less ugly but are a bit bigger.  They
still fit pretty well though.
Put 5V regulator on top layer

Moved the regulator from the bottom layer to the top layer.  It is still
underneath the Spark but there should be plenty of room for it.
Added my name and the Spark logo

Added my name to the board and the Spark logo as well.  Also added the
Spark Eagle Library to the Eagle directory search paths so that I can
edit library parts.
Moved Mosfet and shrunk design

Moved the MOSFET underneath the Spark on the bottom layer so I can save
some space.  I moved just about everything around and was able to shrink
the board down to basically just the size of the Spark and the extra
width of the screw terminals.  It is very small now and costs almost $4
less to build.
Moved the Mosfet to top layer

Moved the Mosfet to the top layer and made the necessary changes to the
board to connect it.  Also moved one of the Range finder pins to be
closer to the other.  Added a thermal pad to the Mosfet and added some
thermal vias.