sub new(%hash)
  browser => which browser to test
  browser_url => base of app
  $ENV{SELENIUM_HOST/_PORT}  || host/port => selenium server
  env vars mean to take existing server, host/port args mean to start with xvnc

method start_server
  starts the selenium server if local, otherwise tries to connect to it

method stop_server
  derp

method test_directory($dir)
  finds HTML files in $dir, calls run_tests_for on them

method run_tests_for($html_file)
  uses Socialtext::WikiFixture::Selenese to run $html_file against selenium
  server

method _get_rows_for($html_file)
  reads $html_file and returns data that S::WF::S understands