Complete rework of IFileSystem

MediaBrowser.LocalMetadata/MediaBrowser.LocalMetadata.csproj

@@ -34,7 +34,7 @@
   <ItemGroup>
     <Reference Include="CommonIO, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\CommonIO.1.0.0.3\lib\net45\CommonIO.dll</HintPath>
+      <HintPath>..\packages\CommonIO.1.0.0.4\lib\net45\CommonIO.dll</HintPath>
     </Reference>
     <Reference Include="Patterns.Logging">
       <HintPath>..\packages\Patterns.Logging.1.0.0.2\lib\portable-net45+sl4+wp71+win8+wpa81\Patterns.Logging.dll</HintPath>
@@ -108,6 +108,13 @@
     <None Include="packages.config" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('$(SolutionDir)\.nuget\NuGet.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\.nuget\NuGet.targets'))" />
+  </Target>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">