v0.13.3 blog post

(cherry picked from commit 179b6380cf)

docs/_posts/2015-05-08-react-v0.13.3.md

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+---
+title: "React v0.13.3"
+author: Paul O’Shannessy
+---
+
+Today we're sharing another patch release in the v0.13 branch. There are only a few small changes, with a couple to address some issues that arose around that undocumented feature so many of you are already using: `context`. We also improved developer ergonomics just a little bit, making some warnings better.
+
+The release is now available for download:
+
+* **React**  
+  Dev build with warnings: <https://fb.me/react-0.13.3.js>  
+  Minified build for production: <https://fb.me/react-0.13.3.min.js>  
+* **React with Add-Ons**  
+  Dev build with warnings: <https://fb.me/react-with-addons-0.13.3.js>  
+  Minified build for production: <https://fb.me/react-with-addons-0.13.3.min.js>  
+* **In-Browser JSX transformer**  
+  <https://fb.me/JSXTransformer-0.13.3.js>
+
+We've also published version `0.13.3` of the `react` and `react-tools` packages on npm and the `react` package on bower.
+
+- - -
+
+## Changelog
+
+### React Core
+
+#### New Features
+
+* Added `clipPath` element and attribute for SVG
+* Improved warnings for deprecated methods in plain JS classes
+
+#### Bug Fixes
+
+* Loosened `dangerouslySetInnerHTML` restrictions so `{__html: undefined}` will no longer throw
+* Fixed extraneous context warning with non-pure `getChildContext`
+* Ensure `replaceState(obj)` retains prototype of `obj`
+
+### React with Add-ons
+
+### Bug Fixes
+
+* Test Utils: Ensure that shallow rendering works when components define `contextTypes`