It seems the Presenter example is pretty broken (unless I'm just stupid). I don't see a `todo` variable defined anywhere, but it's used in several places. Perhaps `var model =` was just missed in a rename?

Also, the "toggle all" function uses a `filter` variable that's undefined AFAICT.

I'm not trying to knock the framework. I like what I see. Just a little hard to follow along when I'm not sure if the code is wrong, or my understanding of it is.