Fixed the Chrome and Firefox custom metrics implementations to return an empty string for undefined results
wptdriver 173
Fixed an exception that would happen in the firefox extension if no custom metrics were defined
wptdriver 174
Merge pull request #238 from geening/master

Remove unittests directory
Fixed #231 - Forcing Safari to always ignore cert errors (maybe it doesn't know about a bunch of roots since it's such an old version).
wptdriver 175
Merge branch 'master' of github.com:WPO-Foundation/webpagetest
Fixed #176 - Added tester info to the xml and json results (including per-run tester data for sharded tests)
Fixed #161 - Added support for specifying "median" in the request URL for the details page.
Fixed #132 - Added the user timing marks to the page data graph.  You should already be able to use it for median selection by specifying medianMetric=userTime.<mark name>
Fixed #73 - removed references to the old wiki documentation site
Removed the continuous video capture UI option
Made the bulk UI visible to admin users (for demoing)
Removed the defunct mobile tab from the visual comparison and traceroute pages
Fixed the CSV reporting for repeat views