Check for permission on viewDidLoad
Check for permission on viewDidLoad

Also need to at least nil out the OSTABManager so we’re not locked in
on “no” permission state. Unfortunately, RHAddressBook keeps its
threads and addressbook observers in a singleton, so this causes some
problems when switching Contacts access permissions while the app is
running.

otanistudio/OSTRealmContacts,otanistudio/OSTRealmContacts