test for downloads-indicator (bug 961270)

close #215
Merge pull request #216 from wagnerand/master

Added new jQuery, jQUeryUI and underscore versions to whitelist
only log the downloads-indicator error for FF27 (bug 965156)
Merge pull request #217 from mstriemer/downloads-indicator-only-for-27-965156

only log the downloads-indicator error for FF27 (bug 965156)
generate validation warnings for downloads indicator (bug 965156)
Merge pull request #218 from mstriemer/downloads-again-965156

generate validation warnings for downloads indicator (bug 965156)