restructured evaluation page layout, added feature to hide/show challenges
swapped timeago labels back to originals,
layout: changed some colors,
removed typeahead from bootstrap.js,
added newest version of typeahead,
updated tag-autocomplete feature to new typeahead version,
added some first autocomplete feature for eval-search
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'