def normalize number, options = {}
      country = if cc = options[:cc]
        self[cc]
      else
        clean! number
        country, cc, number = partial_split number
        country
      end
      number = country.normalize number
      countrify! number, cc
    end
def normalize number, options = {}
      country = if cc = options[:cc]
        self[cc]
      else
        clean! number
        country, cc, number = partial_split number
        country
      end
      number = country.normalize number
      countrify! number, cc
    end
00 for the standard international call prefix.
 http://en.wikipedia.org/wiki/List_of_international_call_prefixes

 We can't know from what country that person was calling, so we
 can't remove the intl' call prefix.

 We remove:
  * 0 or 00 at the very beginning.
  * (0) anywhere.
  * Non-digits.