Add support for streaming rendering

[doug-wade]

I also had to put this in, as I wrote react-dom-stream; probably also not a particularly good use of time right now until rds is a bit more stable.

Migrated from #50

[aickin]

FYI, I'm trying to get streaming in to react core in facebook/react#6618 and facebook/react#6836 . I think we shouldn't work on this until it's in core (or they reject the PRs).

[drewpc]

@aickin Are you still working this on the React core side? Both of the mentioned PRs look outdated and have merge conflicts.

[aickin]

@drewpc Sigh... I think the PRs are dead, and we should probably close this too, as I haven't updated the core react-dom-stream to React 15.

I'm still looking at how to do this with Fiber (the upcoming React architecture), and hope to have some convos with the core team in the coming weeks.

But in the meantime, I'd just close this issue as WONTFIX.

[drewpc]

Okay, thanks for the update.