code: def to_madeline(self):
          
          #Convert sex to madeleine type
          self.logger.debug("Returning madeline info")
          if self.sex == 1:
              madeline_gender = 'M'
          elif self.sex == 2:
              madeline_gender = 'F'
          else:
              madeline_gender = '.'
          #Convert father to madeleine type
          if self.father == '0':
              madeline_father = '.'
          else:
              madeline_father = self.father
          #Convert mother to madeleine type
          if self.mother == '0':
              madeline_mother = '.'
          else:
              madeline_mother = self.mother
          #Convert phenotype to madeleine type
          if self.phenotype == 1:
              madeline_phenotype = 'U'
          elif self.phenotype == 2:
              madeline_phenotype = 'A'
          else:
              madeline_phenotype = '.'
          
          return "{0}\t{1}\t{2}\t{3}\t{4}\t{5}\t{6}\t{7}\t{8}".format(
              self.family, self.individual_id, madeline_gender, 
              madeline_father, madeline_mother, madeline_phenotype,
              self.proband, self.consultand, self.alive
          )
docs: Return the individual info in a madeline formated string