Fixed a missing assembly reference issue in WinServiceAppHost

Author: assaframan

src/StarterTemplates/WinServiceAppHost/WinServiceAppHost.csproj

@@ -36,6 +36,9 @@
     <Reference Include="ServiceStack">
       <HintPath>..\..\..\lib\ServiceStack.dll</HintPath>
     </Reference>
+    <Reference Include="ServiceStack.Interfaces">
+      <HintPath>..\..\..\lib\ServiceStack.Interfaces.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Configuration.Install" />
     <Reference Include="System.Core" />
@@ -78,8 +81,8 @@
   </ItemGroup>
   <ItemGroup>
     <Content Include="default.htm">
-		<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-	</Content>
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it.