Previously, you could download the AngularJS NuGet package, however it would only set up your solution to support Angular with some IntelliSense directly from the Angular objects. What it could not do, however, is understand Angular's way of doing dependency injection.
In the recent release of an extension by John Blesdoe, a member of the Visual Studio community, the IntelliSense experience has been greatly enhanced to simulate the execution while writing code. You will see native angular APIs like the route provider methods visible in Visual Studio 2013 IntelliSense as mentioned in this postfrom the team.
Once you have set up the extension, the next step would be to create an SPA application in your instance of Visual Studio 2013 and reference the Angular package.
You can now use the NuGet package explorer to search for Angular.Core and add reference to the project.
You are now all set to create Angular apps and leverage the great IntelliSense features that you have always enjoyed. Note that this is only supported in Angular 1.x. AngularJS 2.0 is a paradigm shift and will require a completely new extension in future to work.