Dev Tees redesign

Working on a redesign for the Dev Tees shop. Switching from Big Cartel to Shopify and taking the opportunity to put a proper design in place (the current was basically just a placeholder design).

Also, if you want to track progress on the redesign, just visit the GitHub repo where it is all being done in public, open source style: https://github.com/devtees/shop.devte.es/