Missing attribute <meta property>

[vjeux]

Facebook's Open Graph integration uses the non-standard property attribute. However it is currently stripped out.

<meta property="og:type" content="website" />

Suggested plan of action: add it in the non-standard list

https://github.com/facebook/react/blob/master/src/dom/DefaultDOMPropertyConfig.js#L114

[plievone]

fixed in commit 1783e54