Add instructions to run `dnu restore`. Fixes #719

aspnet/dnx/console.rst

@@ -8,6 +8,7 @@ Using the .NET Execution environment (DNX), it's very easy to run a simple conso
 In this article:
 	- `Creating a Console App`_
 	- `Specifying Project Settings`_
+	- `Restoring Packages`_
 	- `Running the App`_
 	
 You can `view and download the source <https://github.com/aspnet/Docs/tree/master/common/samples/ConsoleApp1>`_ from the project created in this article.
@@ -43,6 +44,13 @@ The ``project.json`` files defines the app dependencies and target frameworks in
 
 Save your changes.
 
+Restoring Packages
+------------------
+
+Now that we've specified the project dependencies, we can download all the required packages. Enter ``dnu restore`` at the command prompt to download all the missing packages.
+
+.. note:: Packages need to be downloaded every time you edit ``dependencies`` in ``project.json``. Use the ``dnu restore`` command after editing this section of the project file.
+
 Running the App
 ---------------