Re-adding operation creation, cancellation, and batching to AFHTTPClient
Merge branch '2.0' of github.com:AFNetworking/AFNetworking into 2.0
base64Encode -> base64EncodedStringWithOptions
[Issue #1174] Using copy storage type for dispatch_*_t properties
[Issue #1176] Implementing -canProcessResponse for base serialization
Return YES for canProcessResponse: if acceptableContentTypes is nil (allow for opt-out)