Add warning about object property order.

It's easy to misuse the properties-as-keys feature and end up with children rendered out of order. Add a note and example of how to avoid this.
Update Simulate docs and reorg a little bit
Merge pull request #1135 from spicyj/testutils-docs

Update Simulate docs and reorg a little bit
Add descriptions to package.jsons

Otherwise, npm just reads the first non-header of our readmes, which doesn't
match up accurately or cleanly (no markdown parsing).
React v0.9 blog post
tweak object property warning.
Merge branch 'joshduck-patch-1'

Closes #989
Merge pull request #1131 from spicyj/rel-notes-0.9-2

React v0.9 blog post
Updated Authors
update changelog
version bump to 0.10.0-alpha
Addition of 'this.context' component breaking change

this.context on components is now reserved for internal use by React

closes #1141
Add context deprecation to changelog, reformat