Improve documention about Quantity attributes

[AndreasZaschka]

Out of the last 'Lernraum'-Session, the question of customizing the quantity in the view.

• object.quantity offers the toString() with amount and metric (e.g. 20units).

Here the students like some more detailed information:

• object.quantity.amount offers only the amount,
• object.quantity.metric offers only the metric,
• ...

[odrotbohm]

What does "more detailed information" mean exactly? Related to the JavaDoc?

[AndreasZaschka]

That's a good question, the problem is the usage in HTML (Thymeleaf).
The students like to known, who to access only the amount of the quantity.
So i'm not sure, where to place the info of accessing attributes via Thymeleaf.

Maybe an UML-Diagram of Quantity with the attributes in the technical reference is enough.

[odrotbohm]

The fix for #9 has introduced a new, simplified Quantity API. I am not quite sure how the diagram is supposed to help explaining the usage from within Thymeleaf templates. Maybe extracting some code snippets from the Videoshop sample and adding them to the reference documentation would help?

[AndreasZaschka]

Yes, i agree for that. Documentation need to be edit at this point.

[odrotbohm]

I polished the commit to use a better summary to make sure browsing the commit history actually revelas the intent of the change.