def execute
      File.open(outfile, 'w') do |out|
        if position.downcase == 'bottom'
          out.puts File.read(infile)
          out.puts File.read(insert)
        else
          out.puts File.read(insert)
          out.puts File.read(infile)
        end
      end
    end
def execute
      File.open(outfile, 'w') do |out|
        if position.downcase == 'bottom'
          out.puts File.read(infile)
          out.puts File.read(insert)
        else
          out.puts File.read(insert)
          out.puts File.read(infile)
        end
      end
    end
Creates an Inserter and takes options infile, outfile, insert-file and position where to
 insert the insert-file content. Default position is top
 Inserts the content of the insert-file at the specified positions (top or bottom)