Updated .gitignore file

Merge pull request #12 from ekatynski/promo_image Update README.md

Update README.md Added photo of the calibrator device to the README

Merge pull request #11 from ekatynski/promo_image Added photo of the device for display in the README

Added photo of the device for display in the README

Merge pull request #10 from ekatynski/ekatynski-patch-1 Update note.md

Update note.md Updated disclaimer regarding harness diagram for L01Z board.

Merge pull request #9 from ekatynski/level_shift_pull_up Level shift pull up

Replaced misplaced resistors and redid assembly guide

Placed new pull-up resistor and redid assembly guide