Improved .stop() method of SoundJSGroup.prototype (now can stop only isntance(s)/src(s)/id(s)).
Chagned SoundJSDirector.protoype cached variable to SoundJSDirectorProto.
Added 'SoundJSDirectorProto' to global variables list in .jshintrc.
Build changes (new .load() and improved .stop() methods) and bump version to 0.3.0