[FIX] Method comment.
[REFACTOR] Use more locales.
[REFACTOR] Remove some JS logs.
[FIX] Handle some errors.
[REFACTOR] visual => visuals, pictogram => pictograms in products
[REFACTOR] billingArea => billingAreas in shops
[NEW] Partial implementation of product/category relation.
Merge pull request #244 from intportg/dev

Dev