Create express project
Add metalsmith dependency
Make all routes match to a single action

Until existing static content is intentionally directed differently, the
main route needs to accept all requests and return the static site
content that is generated by metalsmith. If the content doesn't exist
but is in the metalsmith directory, the site will need to be generated.
Remove routing and let the static server handle it

Turns out adding an extra layer of routing isn't necessary, since the
static server can handle everything just fine.
Remove unused directories
Generate metalsmith site when the server runs
Add metalsmith-sass
Set up metalsmith to ignore swap files, use sass
Add automatic rebuilds with --watch flag
Restore the old site's look and content