Some progress

Tested digital and analog reads - analog reads can be used with a timer
and proved more reliable after proper calibration. I explored timers
for the digital sensors but all of the timers on the uno are being used
by something. Using the digital sensors while
in the main loop proved to be ok without any additional computation,
but proved iffy with additional computation and debug outputs (We
should try doing this without debug out). The map representation is
incorrect - points are not with respect to the proper axis direction
and are out of order. I tested on a small sub-section of the path that
I measured out - the control proved to be not too bad. Got to after the
first turn once, up to the turn a few times. Quadrature could really
help us about now - it might be worth investing time into implementing
it. Still much work to be done before we demo.