Autocomplete set maximum results

Hi,

I think it would be desirable to add in the Autocomplete plugin a new optional option called max to set the maximum items you want to show in the autocomplete menu. This can be useful when you have a large array of possible matches. However there's a downside, and that is that the excluded items won't show and the user may have the impression that the one he's looking for is not there. What do you think about it?

I have added the necessary code to do so for a project I'm working in and could share the code if you're interested.

Cheers!