Feature/co2

- vol -> kWh is now an automatic job
- Added kWh -> co2 calculation
- Added new jobs to scheduler and made rollups and difference series calculation trigger every 15/20 minutes

Whenever new device is added, or new synthetic sensor created, a set of default sensors should be created, e.g. m^3 sensor should have also sensorType_kWh and sensorType_co2 added (for automatic calculations)
At the moment this is done by having calculated-sensor function in devices.clj:
https://github.com/MastodonC/kixi.hecuba/blob/feature/co2/src/kixi/hecuba/api/devices.clj#L47
which is called when new device is created and when new synthetic sensor is added:
https://github.com/MastodonC/kixi.hecuba/blob/feature/co2/src/kixi/hecuba/api/datasets.clj#L61
This doesn't seem quite right and any suggestions on how to improve it will be appreciated.
I'm not really sure what you mean here. Could you give me an example?

gas and electric kWh -> CO2 and gas m^3 -> gas kWh we can do automatically. Most of the ones where we are creating a new dataset we can't guess at as we don't know what needs to be totalled.