def family(options = {})
      hash = family_hash(options)
      hash.keys.inject([]){|tot,k| tot << hash[k] }.compact.flatten
    end
def family(options = {})
      hash = family_hash(options)
      hash.keys.inject([]){|tot,k| tot << hash[k] }.compact.flatten
    end
family individuals
 @return [Array]
 @see #family_hash