Fixes #35: Get everything working with Debian/Raspbian 10 and Node.js…

… 12.x.

One more tiny tweak for headings.

Issue #23: Update README to reflect changes to project setup.

Fixes #23: Switch everything to use Ansible for setup.

Make Python scripts executable.

Simplify the project, drop the Arduino bits.

Helps with #15: Make sure to import required function for posting temps.

Cleaned up the Pi docs.

Fixes #12: Add pi-temps.py script for Raspberry Pi GPIO monitoring.

Update README with better crontab info.