anchor.diff:          | Html
           | Library
           | Website of webroot: string
  +        | Ignore
   
       let GetWebRoot settings =
           match settings.WebProjectOutputDir with
  
positive.code:         match settings.WebSharperProject with
          | null | "" ->
              match GetWebRoot settings with
              | None -> Library
              | Some dir -> Website dir
          | proj ->
              match proj.ToLower() with
              | "bundle" -> Bundle (GetWebRoot settings)
              | "extension" | "interfacegenerator" -> Extension
              | "html" -> Html
  
negative.code:             true
          | ProjectType.Library ->
              true
          | ProjectType.Ignore ->
              true
          | ProjectType.Website webRoot ->
              // clean what Unpack command generated:
              for d in ["Scripts/WebSharper"; "Content/WebSharper"] do
  