Begin rendering with diff instead of diffChildren and other golf ⛳

[andrewiggins]

Beginning the render with diff means that the initial Fragment will be rendered as a real Component making our parent._children pointer more useful (will have meaningful _dom pointers, will have forceUpdate function after initial render).

Total change: -12 B

[coveralls]

Coverage decreased (-0.1%) to 99.674% when pulling e4bde0c on enter-the-diff into f848a03 on master.

[JoviDeCroock]

This looks really good, I just hadn't had the same conclusion about hooks yet, In my opinion that should be evaluated in another PR. For the rest this looks really alike what I had. Good work Andre

[andrewiggins]

Coveralls is failing cuz I skipped two tests in debug cuz the implementation doesn't work as expected. Let's fix that debug feature in a separate PR.