Realtime update for twing

[noel-schenk]

Hey @ericmorand
if you find some time take a look at this: google/incremental-dom#438
Playground: https://github.com/noelelias/twing-playground
Just really basic stuff is possible at the moment but I think the concept is good. What do you think?

[ericmorand]

Let's keep the conversation here: google/incremental-dom#438

It's looking very interesting.