title: Create c++ NuGet package with nested include folders
body: <p>I'm trying to package a toolkit for C++ where the include files are spread over several folders, like so:
  <code>Includes - cen_dcm -dcmnet
                      -ofstd
                      -dcmdata
  </code></p>
  
  <p>Inside the nuspec is: <code>include: { ${SDK_Base}\cen_dcm\**\*.h };</code></p>
  
  <p>With this package deployed I get the include files in the following location:
  <code>..\packages\DCMTK.3.42.0.0\build\native\include</code> including subfolders.</p>
  
  <p>When I use the including the IntelliSense has no problems finding it, but if that include file includes something from a different folder it fails to find it.</p>
  
  <p>So I use: <code>#include"dcmnet/assoc.h"</code> which works just fine, but when compiling <code>assoc.h</code> it reports it cannot find <code>osconfig.h</code></p>
  
  <p>That file is in the package but in the <code>ofstd</code> folder. 
  Normally I'd solve that by adding additional includes, but since this is a package I don't want that.</p>
  
  <p>What am I missing? I can't imagine that support for something so basic is lacking?</p>