Also retrieve labels for phone numbers.

When loading phone numbers, also fetch the label for each number and populate APContact.phoneLabels array.

Useful for deciding on priority of numbers on a multiple-phone number contact, or for displaying context.
APPhoneLabel class
Add APContactFieldPhoneWithLabels to populate phonesWithLabels.
Working on wrong field for phones and labels.
Merge pull request #3 from jmhobbs/feature/phone-labels

Retrieve labels for phone numbers.