Convert db seed + sample files to Ruby

This removes some confusion about what countries are in what zone members, and will prevent us from running into issues like #2547
changed products_path to spree.products_path

Fixes #2559
changed root_path to spree.root_path to allow template to be recalled

Fixes #2559
added specs to show how to add address to Order through API and improved addresses retorn with error

Fixes #2546
Fixes #2549
to address in mail_interceptor is always an array. Remove brackets.
Convert db seed + sample files to Ruby

This removes some confusion about what countries are in what zone members, and will prevent us from running into issues like #2547