Macro slide controller

Based on Wemos D1 mini + MCP23017. Check BOM or PDF file for details.

BASADO EN PARTE EN STACKDUINO 1 (G1.0): https://sites.google.com/site/gigimysite/home/macro-rail QUE A SU VEZ SE BASÓ EN STACKDUINO ORIGINAL: http://reallysmall.github.io/Stackduino/

See TXT file for user guide (currently only in Spanish, sorry)