Added "eventData" argument support to Mousewheel event handler

[nielmclaren]

Hi Brandon,

Thanks for providing the code for your jQuery mousewheel plugin.

I needed to pass additional data to the handler so I used code from jQuery's bind handler to implement the eventData argument.

Now you can do this, as with the other mouse events:

$.mousewheel({someVar: 42, prop: 'value'}, function (event, delta) {
alert(event.data.someVar);
});

Cheers,
Daniel

[shaneriley]

I'm going to assume this pull request was not accepted because of the lack of test additions, but even still why has this been sitting out as an open issue with a viable solution for nearly a year? I was just about to do the same as @DanielGM and add this in myself with test coverage, but if it's not going to be merged in I'll just leave the changes locally.

[zzzzBov]

Whoops, I made the same patch, and somehow didn't see this one first. Apologies for that.

[nielmclaren]

No worries, thanks for the plugin!