title: NuGet packages not copied from referenced project
body: <p>I have a very strange error I have no explanation for.</p>
  
  <p>So my setup is very simple:</p>
  
  <p>I have a solution with 2 projects, let's name them <em>ProjectA</em> and <em>ProjectB</em>.
  <em>ProjectA</em> references some NuGet packages and if I build <em>ProjectA</em>, I can see all assemblies in the output directory, the <em>bin</em> folder.
  <em>ProjectB</em> now references <em>ProjectA</em>, but if I build <em>ProjectB</em>, I have the <em>ProjectA</em> assembly in the output directory, but not the NuGet packages referenced from <em>ProjectA</em>.</p>
  
  <p>The reference from <em>ProjectB</em> to <em>ProjectA</em> is added with <em>References -> Add Reference... -> Solution -> ProjectA</em>.</p>
  
  <p>I also created a little test project covering this case, but it works just fine in my test project.</p>
  
  <p>Any ideas?</p>