Add hidden seeds from migrations

[BravoSimone]

As requested in issue #1502 I'm adding seeds for data previously created only in migrations.
I've added only what I thought would be necessary, see the comment for the complete list

[mamhoff]

When would these files be run?

[BravoSimone]

seed.rb requires every file into db/default/ recursively so each time rake db:seed is used it will also load this data

[kennyadsl]

Great work and great report in your comment

A couple of things, you wrote:

# THIS DIFFERS
Spree::Store.create!([
  {name: "Sample Store", url: "example.com", meta_description: nil, meta_keywords: nil, seo_title: nil, mail_from_address: "store@example.com", default_currency: nil, code: "spree", default: true, cart_tax_country_iso: nil}
])
# IN THIS WAY
Spree::Store.create!([
  {name: "Spree Demo Site", url: "demo.spreecommerce.com", meta_description: nil, meta_keywords: nil, seo_title: nil, mail_from_address: "spree@example.com", default_currency: nil, code: "spree", default: true, cart_tax_country_iso: "US"}
])

why not changing this seed as well?

I'm just not sure how to set cart_tax_country_iso field. Migrations bootstraps data with that field nil and seeds with that fields to US, I'd keep both to nil for consistency but maybe it's better to wait for @mamhoff feedback on this.

Also, be sure to change url: "demo.spreecommerce.com" and other references to spree 😄

[kennyadsl]

I think this should be added here instead

[mamhoff]

The cart_tax_country_iso determines for which country taxes are shown in the cart. As stores that sell to the US do not need to show taxes in the cart, I think it's fine to leave this as nil.

[kennyadsl]

👍