Pioreactor

- Fix bug where users are not able to start a job.
- Revisit pump and od calibrations. Some changes to the CLI.
- Some improvements to stirring calibration.
- Fix stirring calibration not responding in the UI
- Fix uninstall plugin bug
- Fix booleans not showing correctly in the PioreactorUI

- removed the dbm storage `pio_jobs_running`. Instead, each job will write metadata about its currently running state to the (tmp) file `job_metadata_<job_name>`. This fixes issue 350.
- Fixed UI issue where specific configs weren't being saved.

- no-op release

- no-op release

- `BackgroundJobWithDodging` now looks for the config.ini section `[<job_name>.config]`.

- New API for adding SQL tables via plugins, and for registering MQTT -> DB parsers.
- New topic for experiment name in MQTT: `pioreactor/latest_experiment/experiment`.
- New topic for experiment timestamp in MQTT: `pioreactor/latest_experiment/created_at`.
- `stable` renamed to `thermostat`
- new callback API for pushing the HAT button down, see `Monitor` class.