Add shop policy pages

[ghost]

Shopify recently ended their 3-month long trial promotion. As a result it's important to get users up-and-running as quickly as possilble. Adding some pages for display and link to Shopify store policies (which can be generated via template from within shopify) would be a nice affordance to get people up and running quickly and showcase this functionality of shopify before users go down the path of trying to create their own policy pages.