Remove AFNetworking
Adding AFNetworking as a submodule
Update Base64Transcoder from existing project
Update the Twitter Example Client to be ARC
Update AFOAuth1Client to be ARC. Remove dependency on old version of AFNetworking.
Update Twitter OSX app to use ARC
Fixed the nonce generation
Notification when application becomes active (coming back from background)
Added NSString category for base64 encoding the nonce. Reqd since the AFN b64 function is private
Revert "Added NSString category for base64 encoding the nonce. Reqd since the AFN b64 function is private"

This reverts commit a1ee46c7fa53a27465953ba6330aa7911f25e0c2.