Fix typos in python3 README The README file had several places where the path was not changed from 'python' to 'python3'. This commit fixes that.

Updated BOM file for PermaProto cell version There is no Instructable for this version, but the BOM spreadsheet is updated for alternate parts

Add alternate path to PyInstaller hooks file on Mac Path to PyInstaller hooks file has changed

Update files for original (Perma-Proto) Instructable Updated the step-by-step doc and BOMs for the Perma-Proto version. Adds info on FET version in Step 1. BOM has updated Digi-Key link with alternate parts.

Update master PCB BOM spreadsheet Add support for FET and update Digi-Key links

Messed up last commit Made some mistakes in the last commit which this commit corrects

Update files for SSR cell Instructable Updated the step-by-step doc and BOMs for the SSR cell version. Mostly add alternate parts. Note that the Instructable itself has not bee created and probably never will be.

Update files for EMR cell Instructable Updated the step-by-step doc and BOMs for the EMR cell version. Mostly add alternate parts.

Update files for SSR module Instructable Updated the step-by-step doc and BOMs for the SSR module version. Mostly add alternate parts.

Update files for EMR module Instructable Updated the step-by-step doc and BOMs for the EMR module version. Mostly add alternate parts.