Scopes event handling from Backbone to Stylie.

Squashed commit of the following:

commit b01bcc79c86406383babcb2e718fbc60c5b83760
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Jul 19 11:38:56 2014 -0500

    Updates ALERT_ERROR and ANIMATION_SAVED call sites.

commit 379d11c230b1bc41acb03eda4b26ce2eb1a30a10
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Jul 19 11:34:03 2014 -0500

    Kills ANIMATION_LENGTH_CHANGED.

commit b28587329a095d87a6356966f303a758e8808978
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Jul 19 11:31:37 2014 -0500

    Updates ACTOR_ORIGIN_CHANGED call sites.

commit 034bbcc7356510e31f123bf14c32f48254269ab6
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Jul 19 11:21:58 2014 -0500

    Updates UPDATE_CSS_OUTPUT events.

commit 00bd2bfa8c948e2d0a84f1bfc6a956f896bebc76
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Jul 19 11:15:57 2014 -0500

    Implements Backbone.Events and updates some call sites.