COlor/brightness suprclass removed

[lmichel]

The problem

Now, Birghtness and Color are subclasses of PhotometricProperty.

This is not relevant since Color is not a photometric property.

PROPOSAL

• Remove PhotometricProperty class
• Derive both Birghtness and Color from Property

This will improve the model semantic and make the mapping easier.

[loumir]

Yes, it seems consistent. we just need the structure of PhotometricProperty to be copied in both classes: value :realQuantity , error:PropertyError as attributes are needed .

[lmichel]

You are right, the diagram is not uptodate