Updates for AFNetworking 3

[billburgess]

Since AFNetworking is the owner of this add-on, would it be possible to update this useful library to work on top of AFNetworking 3? Unfortunately it will require quite a bit more work than I'm comfortable doing for a pull request.

[akac]

Agreed. I'd love to get an AFAmazonS3Manager redesigned for AFNetworking 3.

[Seenu16]

+1

[walteryaron]

+1

[punithbm]

anyone found answer for this?

[sherwoodyao]

+1

[cwveysey]

+1

[ljfantin]

+1

[ljfantin]

anyone found answer for this?

[levey]

Creaeted PR In #113