Naming calibration module

[johanvdw]

I'm still in doubt what would be the best name for the calibration module: it does not calibrate the model in itself, rather calculate some aggregate score which can be used for calibrations.

Some ideas:

• overlay
• bwk_overlay
• accuracy
• verification

Any preference?

[cecileherr]

We were thinking about sthing like veg_validation or validation

[johanvdw]

Also we should decide what to do with the current calibration text we have, this should be adjusted: https://github.com/inbo/niche_vlaanderen/blob/master/docs/kalibratie.rst

[johanvdw]

=> Validation