[2.0] Checklist

[brettsmason]

This will be an ongoing list of 2.0 changes as and when I think of them.

• [ ] Remove hybrid_attr system and replace with JSON-P?
• [ ] Check Gulp build system is working correctly
• [ ] Social media customizer control (sortable?) to replace menu system
• [ ] Move to flexbox
• [ ] Finish integrating new Sass structure
• [ ] Decide on a menu system and implement it!
• [ ] Clean up Sass as much as possible and make less opinionated
• [ ] Add cache busting to stop caching issues of old stylesheets
• [ ] Add additional custom customizer controls (sortable text inputs, gallery etc?)