title: NuGet Pack .nuspec file returns "The replacement token 'version' has no value."
body: <p>This is the error I got while trying to pack a project in Visual Studio 2013:</p>
  
  <pre><code>PM&gt; NuGet Pack C:\ITVizion\RTVizion\ITVizion.RTVizion.Service\ITVizion.RTVizion.Service.nuspec -Prop Configuration=Release
  Attempting to build package from 'ITVizion.RTVizion.Service.nuspec'.
  NuGet : The replacement token 'version' has no value.
  At line:1 char:1
  + NuGet Pack C:\ITVizion\RTVizion\ITVizion.RTVizion.Service\ITVizion.RTVizion.Serv ...
  + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      + CategoryInfo          : NotSpecified: (The replacement...' has no value.:String) [], RemoteException
      + FullyQualifiedErrorId : NativeCommandError
  </code></pre>
  
  <p>What's wrong with this?</p>