Updates Pods
Removes Pods from User Header Search Paths
Fixes code referencing to AFNetworkingErrorDomain

AFNetworking’s AFNetworkingErrorDomain constant has been split into two
new strings:

- AFURLRequestSerializationErrorDomain
- AFURLResponseSerializationErrorDomain
Fixes EditPostViewController

WPEditorViewControllerDelegate’s editPostViewDismissed has been deleted.

This commit updates EditPostViewController, so it doesn’t rely on that
delegate just to signal compeltion.