Allow to retrieve products which a user has contributed

[blazern]

The create_update_product now should accept a parameter edited. The param sill be true when the product is sent from the Init Product Page of the app. Default value should be false.

A new DB table should be created - user_contribution.
Columns:

• user,
• time,
• product_id (nullable),
• shop_id (nullable),
• contribution_type (product_edited, product_added_to_shop, product_reported, shop_created)

When product is edited, added to a shop, reported, or a new shop is created (is created in OSM), a new entry should be added to the table.

Add a user_contributions_data cmd, which will:

• accept a list of contribution types,
• accept a max param,
• return a list of user's contributions.