Minimize javascript and css MS Build Extensions

  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\MicrosoftAjax\ajaxmin.tasks" />
  <Target Name="AfterBuild">
    <ItemGroup>
      <JS Include="**\site.*.js" Exclude="**\*.min.js" />
    </ItemGroup>
    <ItemGroup>
      <CSS Include="**\site.*.css;**\core.css" Exclude="**\*.min.css" />
    </ItemGroup>
    <AjaxMin
      JsPreprocessorDefines="desktop"
      JsKnownGlobalNames="jQuery,$"
      JsEvalTreatment="MakeImmediateSafe"
      JsSourceFiles="@(JS)"
      JsSourceExtensionPattern="\.js$"
      JsTargetExtension=".min.js"

      CssSourceFiles="@(CSS)"
      CssSourceExtensionPattern="\.css$"
      CssTargetExtension=".min.css" />
  </Target>