old_contents: from pyicloud.services.calendar import CalendarService
  from pyicloud.services.findmyiphone import FindMyiPhoneServiceManager
  from pyicloud.services.ubiquity import UbiquityService
  from contacts import ContactsService
  
new_contents: from pyicloud.services.calendar import CalendarService
  from pyicloud.services.findmyiphone import FindMyiPhoneServiceManager
  from pyicloud.services.ubiquity import UbiquityService
  from pyicloud.services.contacts import ContactsService
  
subject: Use absolute import for contacts module. Fixes #22.