Clean up icon fonts

Only include the ones we actually need, and include the icomoon configuration file, so it won't be such a pain to update the custom font in the future.
Add a new route for portfolio items
Add support for more portfolio links
Change image paths
Format the date nicely
Add default link styles
Start styling the portfolio title and date
Be explicit about the order with import styles

If utils comes last, it's annoyingly difficult to override.
Add some banner portfolio images
Add social icons

These will be handy for linking to portfolio projects on Codepen and Github.
Update portfolio details to use the new icons
Update portfolio image styles
Style the tags
Fix banner image on mobile
Better text sizing on large screens
Actually link profile items to the details page
Merge branch 'portfolio-details'
1.0.0