Added link to cspjs - which provides a "task" macro for writing async Javascript code n CSP style using channels.

Example-macros.md

@@ -22,3 +22,4 @@ Note that these gists aren't necessarily kept up to date and might not work with
 * [for loops with `for(x <- items)` and `for(x, i <- items)` syntax](https://gist.github.com/ayosec/8794795)
 * [high-resolution timing macro for Node.js](https://gist.github.com/raysohn/8892286)
 * [Array.prototype.filter-like method call expanded into an efficient loop](https://gist.github.com/andreypopp/8978374)
+* [CSP-style tasks and channels](https://github.com/srikumarks/cspjs)
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