Projects page & introduction of font-awesome

Most of the changes are related to font-awesome, which is just a vendor asset. I need to do some plumbing to make it simply a directory inside `assets/` (or `vendor/`), but its use via a CDN is fine for now.

The "projects page" is fine as is, for the time being. I need to take one or two hours to write descriptions for these projects -- and probably add some others that are lying in my Dropbox `code/` directory, where I leave my experiments and some snippets.