Updated version number in README.md to 0.2.13

Author: Sebastian Gebhardt

README.md

@@ -2,7 +2,7 @@
 
 #### The de-facto solution to flexible routing with nested views
 ---
-**[Download 0.2.11](http://angular-ui.github.io/ui-router/release/angular-ui-router.js)** (or **[Minified](http://angular-ui.github.io/ui-router/release/angular-ui-router.min.js)**) **|**
+**[Download 0.2.13](http://angular-ui.github.io/ui-router/release/angular-ui-router.js)** (or **[Minified](http://angular-ui.github.io/ui-router/release/angular-ui-router.min.js)**) **|**
 **[Guide](https://github.com/angular-ui/ui-router/wiki) |**
 **[API](http://angular-ui.github.io/ui-router/site) |**
 **[Sample](http://angular-ui.github.com/ui-router/sample/) ([Src](https://github.com/angular-ui/ui-router/tree/gh-pages/sample)) |**