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kotlinlang

Folks, I'm heading back into some tornado work, and I'm looking at `App` vs `Application`. I am wondering what one gains by using the former instead of the latter. My reluctance: my program has to do some work _before_ deciding what the main view is going to be. `App` wants to know my main view's _class_ rather than an instance. By the time I get control in `App::start()`, it seems the App has already decided this and constructed the instance. A further minor issue: that means my main view must have a default constructor. So if I stick with `Application`, what am I giving up?