Phone type does not detect country

[alexkwolfe]

A GB phone number is interpreted as a US phone number. The reason is that it is not possible to tell the difference between these numbers in some cases, and US is the first region code to be tried.

A better solution might be to try to detect the country using other fields or using database lookups (say against an area code database). This is dependent upon fixing #4, so that we can examine the full lead while we're parsing the phone number.