anchor.diff:        Version : string
         Authors : string list
         Project : string
  +      Title : string
         Summary : string
         Description : string
         Tags : string
  
positive.code:     
      let replacements = 
          [ "@build.number@", parameters.Version
            "@authors@", parameters.Authors |> separated ", "
            "@project@", parameters.Project
            "@summary@", parameters.Summary
  
negative.code:           else "0.1.0.0"
        Authors = []
        Project = ""
        Title = ""
        Summary = null
        ProjectFile = null
        Description = null
  