pbs image, button color visibility, responsive bug fix, and minor javascript fix.
Merge pull request #2 from uvalib/ui-work

pbs image, button color visibility, responsive bug fix, and minor javasc...
Working...
Updated robots.txt to request no crawling.
Added baseline uva role maps.
Added units.
Merge branch 'pbs-release' of https://github.com/mikedurbin/avalon into pbs-release