thank-you.html & about— changed grid
index.html: changed grid, added meta tags & content
common.css: added padding in <main>
header.css: added current page
default.html: meta tags and nav tweaks
about.html: added show banner and banner text
created promo_large, promo-small.html, and banner.svg
promos: changed place hold image
index: added banner jekyll, added promos
buttons.css: changed font-weight
forms.css: changed font
header.css: added banner css
promos.css: changed padding and margins
default.html: meta tags, banner jekyll