CM Updates to Boilerplate

[camilamercado]

This repository was cloned from the React Hooks example provided by Shopify.
Updates have been made throughout the application, below is a overview of notable substantial changes:

Redux pattern

• adding a pattern to capture collection data
• adding a pattern to capture loading status
• all of the UX redux patterns

Components

• Home.js
• CustomProducts.js
• Tray.js (Staging zone for selected objects in a custom order)
• CollectionProducts.js

CSS

The CSS has been almost entirely rewritten including the addition of a globals file for custom variables and mixins.