I think we're hooking onto bad set of wheel events here.

`DOMMouseScroll` event is a non-standard one https://developer.mozilla.org/en-US/docs/DOM/DOM_event_reference/DOMMouseScroll . That page says that only very old Firefox supported this. We should probably remove this, since it is deprecated.

`mousewheel` event is also non-standard: https://developer.mozilla.org/en-US/docs/DOM/DOM_event_reference/mousewheel , but I see that has more value as a non-standard event than DOMMouseScroll, since it works on IE6+: http://msdn.microsoft.com/en-us/library/ie/ms536951(v=vs.85).aspx and old Presto Opera (v12 and older).

The standard DOM3 spec event is called simply `wheel`. See http://developer.mozilla.org/en-US/docs/DOM/DOM_event_reference/wheel . We should add support for that event instead. IE11 supports this event as well.