Switch over to using GCD for thread safety in RHAddressBook. This could do with more testing before hitting master.
Wrap RH_AB_ENABLE_DEBUG_LOGGING and RH_AB_INCLUDE_GEOCODING in #ifndef to make it easier for others to override them without editing the project.
Disable Geocoding by default.
Merge branch 'gcd-thread-safety'
Update tests for 7.1.
Update projects settings for 7.1 and fix a few type conversion warnings.
Update readme.
added functions to grab Person image data
Merge pull request #45 from RyanBertrand/person-image-data

Person thumbnail/image data helpers
Fix building under arc with 7.1.
Add a peopleWithEmail: method to RHAddressBook.
Switch over to XCTest.
Clean up some readonly properties for arc.
Wrap deprecated dispatch_get_current_queue() to suppress deprecation warning.
This is a safe use of the method because the code path is only used on pre iOS 5 devices.
Unify RHPerson vCard representation logic. Fixes #53.