Update readme from alpha to beta

Close #931
Fix #927

Author: Carlos Filoteo

README.md

@@ -13,7 +13,7 @@ Prototype of a CLI for Angular 2 applications based on the [ember-cli](http://ww
 
 This project is very much still a work in progress.
 
-We still have a long way before getting out of our alpha stage.
+The CLI is now in beta. 
 If you wish to collaborate while the project is still young, check out [our issue list](https://github.com/angular/angular-cli/issues).
 
 ## Prerequisites
@@ -102,7 +102,7 @@ ng generate route hero
 
 This will create a folder which will contain the hero component and related test and style files.
 
-The generated route will also be registered with the parent component's `@RouteConfig` decorator. 
+The generated route will also be registered with the parent component's `@RouteConfig` decorator.
 
 By default the route will be designated as a **lazy** route which means that it will be loaded into the browser when needed, not upfront as part of a bundle.