Drop down menu:
 - view on GitPop
 - view on GitHub
added update_at column
Changed default result per page from 30 to max of 100, refs http://developer.github.com/v3/#pagination
sortable columns using Stuart Langridge library http://www.kryogenix.org/code/browser/sorttable/
replaced bootstrap and jQuery CDN by local refs to simplify offline dev
replaced FontAwesome CDN by local refs to simplify offline dev