title: How to batch request with AFNetworking 2?
body: <p>So I'm rewriting an app for iOS 7 with AFNetworking 2.0 and I'm running into the issue of sending a batch of requests at once and tracking their progress. In the old AFNetworking there was the <code>enqueueBatchOfHTTPRequestOperations:progressBlock:completionBlock:</code> method on <code>AFHTTPClient</code>, this is clearly refactored out and I'm a bit confused on how to enqueue multiple requests.</p>
  
  <p>I have created a subclass of <code>AFHTTPSessionManager</code> and I'm using the <code>POST:...</code> and <code>GET:...</code> methods to communicate with the server. But I can't find anything in the code and/or docs to enqueue multiple requests at once like with the old <code>AFHTTPClient</code>.</p>
  
  <p>The only thing I can find is the undocumented <code>batchOfRequestOperations:progressBlock:completionBlock:</code> method on <code>AFURLConnectionOperation</code>, but that looks like the iOS 6 way of doing this. </p>
  
  <p>Clearly I'm missing something in the new <code>NSURLSession</code> concept that I should use to batch requests or looking over a new AFNetworking feature. Hope someone can help me on the right track here!</p>
  
  <p><strong>tl;dr:</strong> How can I send a batch of requests with my <code>AFHTTPSessionManager</code> subclass?</p>