Add XML documentation as additional source so <inheritdoc/> works properly

Author: sharwell

src/Documentation/AdditionalReferenceDocumentation.shfbproj

@@ -28,7 +28,9 @@
     </TransformComponentArguments>
     <DocumentationSources>
       <DocumentationSource sourceFile="..\packages\Newtonsoft.Json.5.0.6\lib\net40\Newtonsoft.Json.dll" />
+      <DocumentationSource sourceFile="..\packages\Newtonsoft.Json.5.0.6\lib\net40\Newtonsoft.Json.xml" />
       <DocumentationSource sourceFile="..\packages\SimpleRESTServices.1.3.0.1\lib\net40\SimpleRESTServices.dll" />
+      <DocumentationSource sourceFile="..\packages\SimpleRESTServices.1.3.0.1\lib\net40\SimpleRESTServices.xml" />
     </DocumentationSources>
   </PropertyGroup>
   <!-- There are no properties for these groups.  AnyCPU needs to appear in order for Visual Studio to perform