def ga_track_event(category, action, label = nil, value = nil)
      ga_events.push(GoogleAnalytics::Event.new(category, action, label, value))
    end
def ga_track_event(category, action, label = nil, value = nil)
      ga_events.push(GoogleAnalytics::Event.new(category, action, label, value))
    end
Tracks an event or goal on a page load

 e.g. writes
 ga.('send', 'event', 'Videos', 'Play', 'Gone With the Wind');