Change rockauth to use a single instance of NSURLSession.  Use the main queue for the NSURLSession when calling success blocks so users dont' have to dispatch onto the main queue in their success blocks
Change rockauth to use a single instance of NSURLSession.  Use the main queue for the NSURLSession when calling success blocks so users dont' have to dispatch onto the main queue in their success blocks

rocketmade/rockauth-ios,rocketmade/rockauth-ios