add motor controller to bill of materials
[challenge-bot] / arduino-sketches /
drwxr-xr-x   ..
drwxr-xr-x - both_motors
drwxr-xr-x - both_sonars
drwxr-xr-x - follow
drwxr-xr-x - motor
drwxr-xr-x - pushbutton
drwxr-xr-x - right_motor
drwxr-xr-x - right_sonar
drwxr-xr-x - serial
drwxr-xr-x - stay_on_table
drwxr-xr-x - untethered