Made footer adjustment at bottom absolute
Made footer adjustment at bottom absolute

- app/assets/stylesheets/application.scss - Added box-sizing: border-box
  to make future CSS adjustments saner.

  Implemented a "footer at bottom of page" strategy as shown in this
  Codepen: https://codepen.io/cbracco/pen/zekgx

BOWiki/BOW,EBWiki/EBWiki,EBWiki/EBWiki,BOWiki/BOW,EBWiki/EBWiki,EBWiki/EBWiki,BOWiki/BOW