Add about page style - update text
Add about page style - update text

        * Add about specific CSS classes

        * Add menu hamburger for mobile
        * Fix header/footer alignment issues on mobile nav menu

        * Remove onload scroll jumps, as image loading
          can take a bit of time, and during this time,
          you can scroll down - only to have it jump
          back up. This remains a bit of a pain point.

        * Update text to reflect appropriate content.

ojourmel/showcase