"checkbox" not "checked"

I can only assume this was a typo.
Update docs to mention that you need both es5-shim.js and es5-sham.js to use React with IE8.
Fix typo in docs.
Wrap _performComponentUpdate call in try/finally

Fixes #208. If you attempt a state update with a bad state then the render will fail (and the DOM won't change) but if you switch back to a valid state later then it'll rerender properly.
Rewrite Older Browsers polyfill section for clarity.
Merge pull request #892 from rtfeldman/update-shim-docs

Mention need for `es5-sham.js` in docs
Merge pull request #897 from spicyj/gh-208

Wrap _performComponentUpdate call in try/finally
Merge pull request #881 from spicyj/checkbox-not-checked

"checkbox" not "checked"
Remove stray "117", combine lines in polyfill docs
[docs] Add timezone to _config

This way we hopefully won't churn the feed when genereated in
a different time zone (eg France).
[docs] Remove commented out ghbtns
throw when using component/component class as mixin

throw invariant error to help people new to mixins, so that they don't get misled into trying to mixin components into another component
Introduce PropTypes.shape

This diff introduces PropType.shape which lets you type an object. PropType.object was already defined and since it isn't a function I couldn't really overload the meaning to also accept a type list. Instead of doing hackery, I decided to name it `shape`.

An example where this could be used is style:

```
  propTypes: {
    style: PropTypes.shape({
      color: PropStyle.string,
      fontSize: PropTypes.number
    })
  }
```
Add `topContextMenu` to the event dependencies for `SelectEventPlugin`
Adding 'scope' to list of standard html attributes in react

scope is used for screen readers, so it would be nice to have. Documentation here: http://www.w3.org/TR/WCAG20-TECHS/H63
Kill last remaining use of `$` in React

It's only used here, so let's just inline this and get rid of the additional module.
Also it will make people like this guy happy: https://github.com/facebook/react/issues/900

(of course he might be even more happy if he wasn't using MS TFS....but that's a much bigger diff, and not one I can write...)