usepropeller/afmotion — pull request #32 by sajoku (2013-11-08 14:03:42+00:00)
Title: Check if NSURLSessionTask is defined

When I use
```
AFMotion::Client.build_shared(base_url) do
header "Accept", "application/json"

response_serializer :json
end
```

and run

`rake target=6.0

I'll get an error saying NSUrlSessionTask isn't there. I believe the check should be as stated in the pull request.

` http_result.rb:6:in `initialize:': uninitialized constant AFMotion::HTTPResult::NSURLSessionTask (NameError)
from operation.rb:26:in `block in failure_block:'