Passes esc/tab/return keyup events through to emitted hide event 

#173

Can submit to a different branch if needed.
There are two place else showing below using `hide` method and most of them don't pass time to it. 
so, just let `e` as the first argument would be batter.

https://github.com/ichord/At.js/blob/master/src/app.coffee#L66
https://github.com/ichord/At.js/blob/master/src/app.coffee#L64