Some minor css and add about box 

Hi there -- I made a small change so the input and output divs don't overlap on a medium screen, which I'd mentioned to Casey.  the left col is lg-6 and the right is md-6.  The other things are ideas you're obviously free to disregard.  I thought it might be nice to have an "about" box, so added a link at the top and div at the bottom.  Forgive the inline CSS -- I'm not familiar with the react framework -- though looks cool -- so it's a bit hacky.