Sends a command to Notifier when the testing has finished manpages.ubuntu.com/manpages/gutsy/man1/notify-send.1.html
output a finished notification
# File lib/hydra/listener/notifier.rb, line 7 def testing_end icon_path = File.join( File.dirname(__FILE__), '..', '..', '..', 'hydra-icon-64x64.png' ) %xnotify-send -i #{icon_path} "Hydra" "Testing Completed"` end