Add:
        static/img/about/bio*.jpg
                -Scale bio images to a smaller size, from 500x500px to
                200x200px, as they were far larger than necessary for their
                dimensions on the about page.

Add:
        templates/about.html
                -Replace filler text with real biographies.
                -Make all images hyperlinks to our `GitHub`s.

        static/img/about/bio(1, 2, 3).jpg
                -Update biography images with our headshots.

Add:
        templates/about.html, static/sass/about.sass
                -Add biography-section HTML structure and styling, containing
                filler images and lorem ipsum; now, it's just a matter of
                substituting in the appropriate content.

        static/img/about.bio(1, 2, 3).jpg
                -Add placeholder bio images.