react.js conf updates
better wording thanks to @jwalke
Mention that talks will be recorded
Use warning module for context warning instead of invoking console.warn and monitorCodeUse directly.  Depends on https://phabricator.fb.com/D1695279
Merge pull request #2579 from jsfb/context-to-warning-module

Use warning module for context warning instead of invoking console.warn ...
Add additional field for ART reconciler

ART, just like MultiChild adds an expando property to manage it's diffing
state. This is ugly and bad. We should be moving this state outside the
component for use by the diffing algorithm. This state is not needed by
components nested in composites, and varies by diffing algorithm.

It sucks that I have to add it to every component just to support ART,
but that's the quickest solution, other than disabling preventExtensions.

At least now we know that it sucks.
Merge pull request #2593 from sebmarkbage/mountImage

Add additional field for ART reconciler
Wrote Community Roundup #24
Community #24: New Carousel link, spelled react-prism correctly, and removed the whale-speak.
Merge pull request #2594 from steveluscher/community-round-up-24

Wrote Community Roundup #24
Replaced document.createElement with ReactTestUtils.renderIntoDocument where container was not subsequently utilized.
Fixes #1250
Fix lint warnings, style fixups

Followup work for recent PRs
Merge pull request #2566 from zpao/style-fixup

Fix lint warnings, style fixups
Remove fbtransform/syntax.js

This was a file we probably never should have synced out in the first
place. We don't use it and it provides the same basic functionality that
bin/jsx provides.
Merge pull request #2597 from jsfb/render-into-document

Replaced document.createElement with ReactTestUtil
Merge pull request #2601 from zpao/rm-fbtransform-syntax

Remove fbtransform/syntax.js
Revert "Remove fbtransform/syntax.js"
Merge pull request #2603 from facebook/revert-2601-rm-fbtransform-syntax

Revert "Remove fbtransform/syntax.js"
Warn if context values differ, related to issue #2112
Merge pull request #2602 from jsfb/context-tripple-equals

Warn if context values differ, related to issue #2