Better error messages when importing orders (api)
Set state_name when state record not found [api]
Scope state per country on api import script
Make line_items attr handle more flexible on api

When importing orders or creating orders and line items at once the
line_items key on order payload would provide an array not a hash. The
API need to consider then that both hash and array might be provided and
handle it gracefully
Add sku to line item attr_accessible

Allow users to find variant by sku when importing orders
Ensure item quantities are converted to integer

Prevents `String can't be coerced into Fixnum` when importing orders.
To increase a quantity for existing line item we need to pass a integer
always not a string
Fix state_name spec for order import script