Figure out our linkability story

<a href="https://github.com/Hixie"><img src="https://avatars.githubusercontent.com/u/551196?v=3" align="left" width="96" height="96" hspace="10"></img></a> **Issue by [Hixie](https://github.com/Hixie)**
_Friday Jul 17, 2015 at 22:45 GMT_
_Originally opened as https://github.com/flutter/engine/issues/100_

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See: https://github.com/flutter/engine/blob/master/sky/specs/linkability.md
