Ensure className={false} turns into string 'false'

Fixes inconsistency shown by http://jsfiddle.net/zpao/qeXLm/.
Test that Node is a function before using instanceof on it
omitClose for all void elements

According to http://www.w3.org/TR/html5/syntax.html#void-elements the following elements should not specify end tags:

area, base, br, col, embed, hr, img, input, keygen, link, meta, param, source, track, wbr
Tweak propTypes examples for clarity in oneOfType
[Docs] document optional param for renderComponentToString
Add polygon tag to transform

Fixes #1144.
Merge pull request #1082 from spicyj/class-false

Ensure className={false} turns into string 'false'
Add Shirtstarter to examples of production apps.

Shirtstarter is 100% built on React.
Merge pull request #1200 from ericflo/patch-1

Add Shirtstarter to examples of production apps.
Merge the lists of JSX integrations in the docs.

There were these two lists of JSX tools at Complimentary Tools
and Tooling Integration, that were a bit out of sync with each other.

Bring them together and add a link to the former from the latter.
Updated React Version 0.9.0

**Updated Url's:**

CDN:

    http://fb.me/react-0.9.0.js

    http://fb.me/JSXTransformer-0.9.0.js

Starter Kit

    http://facebook.github.io/react/downloads/react-0.9.0.zip
Merge pull request #1203 from fson/jsx-integrations

Merge the lists of JSX integrations in the docs.
Merge pull request #1204 from jmingov/patch-1

Updated React Version to 0.9.0
Add missing backtick in complementary-tools.md
Fix docstring typo for pure render mixin
Merge pull request #1207 from passy/patch-2

Add missing backtick in complementary-tools.md
Add thinking in react to the official docs
fix
Merge pull request #1209 from petehunt/thinking-in-react

Add thinking in react to the official docs + cleanup
Fix IE8 disabled input throwing on focus

When IE8 focuses a disabled item, it throws
This makes sure the we're not focusing the item during selection restoration/autofocus when the element's disabled.