LinTrain Code

Smart throttle receiver re-designed with surface mount parts

More robust handling of the smart throttle comms in the receiver
Tweaks to allow it to run on a PIC10F202

Partial updates for changes to the NMRA standards for CVs
Better failure handling, and a kludge to cope with a buggy decoder

Support for updated XtrkCAD file format (from V5.2)
Now handles most XtrkCAD turnout types, not just the simple cases

Use a dummy version of the driver if the real one can't be loaded

Enhancements to CDU decoder PIC code:
- Changed resolution of output duration to 10ms
- Duration with top bit set now means the channel is a slave of the one before
- Now uses CV545 (bottom 3 bits) to adjust the boost voltage

Clean out an unwanted file - legacy of CVS

Modified CDU turnout decoder hardware to use parts from the JLCPCB SMD stock

Updated the "light accessory" decoder design to use a more modern PIC in SMD

Updated optical detector design to use a more modern PIC
Ported code to the new device and a nicer build system