Fixes issue #76 - Subscribers are invoked for all events instead of registered events (https://github.com/greenrobot/EventBus/issues/76)

Updated modifiers ignore mask for invalid volatile modifiers that are incorrectly returned by some implementations of Method.getModifiers() .See https://github.com/greenrobot/EventBus/issues/76 and http://bugs.java.com/bugdatabase/view_bug.do?bug_id=6868371