Adding ability to use ENV vars to configure the CI runner at registration (#6)

Fixing retry for CI runner registration

Adding pypi version overrides (#5)

Might help to put the opt in the right place...

Merge pull request #3 from inhumantsar/revert-2-ensure_pull

Revert "Adding `pull: yes` to docker_service calls to enforce auto-update."

Merge pull request #2 from inhumantsar/ensure_pull

Adding `pull: yes` to docker_service calls to enforce auto-update.

Adding ignore_errors so the retries actually retry

updating tests

adding retries to ci runner registration, moving backup cron to start

Derp

Adding backup crontab

removing executor

adding registration command and options, moving runner env vars to opts