added readyState trigger to renderEvents

Added a readyState trigger at the end of each renderEvents function.  This is necessary for code which needs to act after a set of events is rendered.  One use-case for this is when events are pulled via ajax within Drupal. Drupal.attachBehaviors needs to be run after new content is added to the DOM but is a fairly heavy function and so cannot reasonably be run against each event individually as it is rendered.  This is a possible solution to issue #753.