Batch insert of measurements.

- Remove queue and update dirty dates after batch is done.
- Rename measurements table and update calculations.
- Batch calculations.
- Fix difference series calc.
- Add daily sensor status check job.
- Fix measurements by slice.
- Fix getting reading by timestamp
- Fix median spike check and add more etl.
Merge pull request #41 from MastodonC/feature/batched-insert

Feature/batched insert
Don't call ring-response on measurement post response.
Temporary fix to deal with data stored as html

We'll need to migrate this data properly, but this will work for now.
Better contextual data.

Including pics and technology images.