Disable shadow copying in release build. Fixes #433

Author: davidebbo

src/WebJobs.Script.WebHost/Web.Release.config

@@ -18,6 +18,8 @@
   -->
   <system.web>
     <compilation xdt:Transform="RemoveAttributes(debug)" />
+    <hostingEnvironment shadowCopyBinAssemblies="false" xdt:Transform="Insert" />
+
     <!--
       In the example below, the "Replace" transform will replace the entire 
       <customErrors> section of your web.config file.