add Video: Unidirectional data flow architectures (cyclejs-community#51)

* add Video: Unidirectional data flow architectures

* Update README.md

README.md

@@ -31,6 +31,7 @@ A collection of awesome Cycle.js tools, resources, videos and shiny things.
 ### Videos
 
 * [What if the user was a function?](https://www.youtube.com/watch?v=1zj7M1LnJV4) - Presentation at JSConf BP2015 by [Andre Staltz](https://twitter.com/andrestaltz)
+* [Unidirectional data flow architectures](https://vimeo.com/168652278) - Presentation AtTheFrontend Conference by [Andre Staltz](https://twitter.com/andrestaltz)
 * [Cycle.js and functional reactive user interfaces](https://www.youtube.com/watch?v=uNZnftSksYg) - Presentation at ReactiveConf 2015 by [Andre Staltz](http://twitter.com/andrestaltz)
 * [Intro to Functional Reactive Programming with Cycle.js](https://www.youtube.com/watch?v=6_ETUyh0tns) - Presentation by [Nick Johnstone](https://twitter.com/widdnz)
 * [Cycle.js Fundamentals](https://egghead.io/series/cycle-js-fundamentals) - Playlist at [egghead.io](https://egghead.io)