Added assets
Added main container, header
Created basic layout, added font
Built out first section
Built out credit card info section
Built out billing info; adjusted media Qs
Added more fields to billing; styled form
Removed unneeded sections
Restructured form

- Moved form to Order Summary section
- Added ID to form, and form="id" to all non-descendant inputs
- Put non-descendant fieldsets into <section>s
Added line dividers
Created quantity fields; updated responsiveness
Coded footer; made all form IDs unique
Added Qty labels to inputs
Renamed folder
Adjusted media queries widths
Added responsive meta tag
Merge branch 'dcon-dev'