feature request: live search results

[andrewrk]

Small feature request: show search results as I type instead of having to press Enter. This welcomes the user to try many searches quickly to find what they want. Since the search is client side it has no problem keeping up with searching every key stroke.

As an example, rust documentation does this: http://doc.rust-lang.org/std/index.html

Also I did not notice there was a search box until I read in the feature list that there was search, and I went back to search for the search box. You might consider featuring it more prominently.