Consider using ref to log element references when there is a warning

[kloots]

When there's an error our current implementation will only log element references for custom components (via a componentDidMount/componentDidUpdate callback). We could use ref over id generation to log element references.

For more: https://facebook.github.io/react/docs/more-about-refs.html

[erin-doyle]

I believe this has been done in v1.0.0. I'm closing this but please let me know if you disagree.