Fix for NSProgress bug where two child NSProgress instances are added to a parent NSProgress.
AFURLSessionManagerTaskDelegate creates a NSProgress in its initializer. However, -[AFURLSessionManager addDelegateForUploadTask:progress:completionHandler:] assigns a new NSProgress to the delegates progress property.
When using -[NSProgress becomeCurrentWithPendingUnitCount:] two NSProgress children are added, as two are created in the current parent's context.
Fix iOS test app detail text label.
Merge pull request #2451 from shepting/master

Fix iOS Example App Detail Label
Minor refactoring
Merge pull request #2445 from mediumbear/master

Fix for NSProgress bug where two child NSProgress instances are added to...