Support for "auto select" first item

[viirre]

Handy when you often just want to hit the first item in the list after the search (so you don't have to hit the "down" key first if the first item is the one you want).

I noticed that the branch name is unfortunate ("option" should be "item"), hopefully that doesn't really matter.

[pespantelis]

Hi @viirre,

I have used this approach at the beginning, but I changed later because of the issue #12.
So, an option covers all needs.

Thanks!