def shstrings
      strings = Sharedstrings.new()
      File.open(@destination + '/xl/sharedStrings.xml', 'r') do |f|
        Ox.sax_parse(strings, f)
      end
      @sharedstrings=strings.stringarray
    end
def shstrings
      strings = Sharedstrings.new()
      File.open(@destination + '/xl/sharedStrings.xml', 'r') do |f|
        Ox.sax_parse(strings, f)
      end
      @sharedstrings=strings.stringarray
    end
Invokes the Sharedstrings helper class