fix bug 2015059: where the native sqlite comparison method...

fix bug 2015059: where the native sqlite comparison method phone_number_compare() treated all alpha addresses as the same phone number.

- changed phone_number_compare() to handle alpha chars. Before this change the algorithm skipped over all non-dialable chars for
comparison, and thus treating "foo" and "bar" as the same addresses. now we don't skip any char that's alpha. This would treat
"foo" and "bar" as separate addresses, as well as treating "1-800-flowers" and "800-flowers" as the same number.