Expose the request queue from RCResource so a caller can set up their own queues. #9
Description
Currently when a resource runs a request, it's using the main thread's runloop (instead of the NSOPQ based methods that were new in iOS5) to run the request because of bugs in the NSOpQ.
Confirm the bugs are fixed and run the request on the main Q or a supplied external Q. Also, allow the post-processing Q to be set from outside the request as well. It's currently just using a global concurrent Q.