def remove_value(v)
      index = @values.index(v)
      if index
        return !@values.delete_at(index).nil?
      else
        return false
      end
    end
def remove_value(v)
      index = @values.index(v)
      if index
        return !@values.delete_at(index).nil?
      else
        return false
      end
    end
Removes the first occurence of the specified value from this Tag.

 _v_:: The value to remove

 Returns true If the value exists and is removed