Moved the GPS newData signal generation into the Plant.

It's also more correct now, as the newData signal has the same delay as
the GPS data and also the same startup delay.
Make sure wp0 and wp1 are always in view as well.
Run for 1000s.
Updated since the ECAN1 library has been removed.

Added a new Ecan1RcNodeHelper file that has a single function that converts library calls
for the ECAN1 peripheral to MATLAB-compatible function calls. This is then called in the
Simulink through a C-function call block. Functionality should be equivalent.