(#1907) - Make adapters responsible for cleaning their own data
(#1923) - Enable safari in travis
(#1925) - Fail early when running browser tests on saucelabs
(#1901) - Added github ribbon
(#1574) - Website icons
(#1919) - specify script/adapter for perf tests

This commit allows you to pass the script src or
adapter (e.g. 'websql') as options to the URL of
the performance tests.