Fix Denomination

[msajadi824]

Remove Denomination field from Price Table. Create New table "Denomination" with this fields:

• denomination
• currency
• item (relation ship with item table item(1)<->(*)denomination )

and add pages for add and edit denominations in items in master and add force user to add denomination for the currency for item, when the adding the item to dist.

[imansoltani]

Checking that the item denomination exists will happend here: app/m/distributors/xx/items/add