Uses XML source file (Maintain node structure for correct parsing).

NEW - Uses setInterval to emulate onEnterFrame events with decreased CPU usage

NEW - Tweening equations optimised to be more accurate, less CPU intensive

NEW Button animation controlled via a "Listeners" approach

NEW - Support for an "action" argument to be passed to primary buttons so that they too can be made to load/goto etc. onMouseUp.

NEW - supports sounds to be attached from the library to play on primary and secondary button presses.