Update README.md

Author: christopherthielen

README.md

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 **[Help!](http://stackoverflow.com/questions/ask?tags=angularjs,angular-ui-router) |**
 **[Discuss](https://groups.google.com/forum/#!categories/angular-ui/router)**
 
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+*_Please help us out by testing the 1.0 alpha release!_* 
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+[1.0.0alpha0 Announcement](https://github.com/angular-ui/ui-router/releases/tag/1.0.0alpha0) ([Source  Code](https://github.com/angular-ui/ui-router/tree/feature-1.0)) | [Sample App](ui-router.github.io/sample-app/) ([Source Code](https://github.com/ui-router/sample-app)) | [Known Issues](https://github.com/angular-ui/ui-router/issues?q=is%3Aissue+is%3Aopen+label%3A1.0)
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 AngularUI Router is a routing framework for [AngularJS](http://angularjs.org), which allows you to organize the