v2.1.1

Fixed issues w/ visibility listener and re-worked marks calculation

2.1.0

Changes:

• Timers no longer start themselves - they must be started via timerInstance.start() or a observing a configured engagementEvent
• Timer start times now default to the time the timer was created; previously, a timestamp stored when the class loads would be used. To change the start time, set the startTime option
• Context-specific behavior fixes
• Better tests
• Updated build scripting

2.0.0

Version 2.0.0