Add "tons", "Number of eggs", "cases" to unit

[miguelalba]

Every unit in the vocabularies has an id, name, comment and category id (category). I need all this missing information for these units. A proposal could be:

Name	Comment	Category
Ton		Mass (18)
Number of eggs		Number (19)
Cases	Number of cases	Number (19)

• The ids of the units are assigned unique and not relevant. They are not included in the table.
• The categories have their categories ids in parentheses. * By ton do we mean the British ton or the metric tonne? * What category should "Cases" have?

[miguelalba]

To include proposal in Db.

[esther-sundermann]

I agree with the categories.