Commented Feature: Expose Chakra [29]

It would be great to get access to the IE9+ Chakra engine as a lightweight (in terms of file size), ES5 compatible alternative to V8.
Comments: The combination of [ES6 Proxies](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy) and native functions should _mostly_ unblock Chakra integration, but some features may still not be possible (e.g., GlobalMembers). We'll take a closer look when the new OS and tools are released.