title: Checking in packages from NuGet into version control?
body: <p>Prior to NuGet, it was common accepted 'best practice' to check-in all external DLLs used on a project. Typically in a <code>Libs</code> or <code>3rdParty</code> directory.</p>
  
  <p>When working with NuGet, am I supposed to check-in the <code>packages</code> directory, or is there a way for MSBuild to auto download the needed packages from the nuget feed?</p>