RestKit/RestKit — pull request #870 by DracoLi (2012-07-19 23:47:25+00:00)
Title:  Enabled RKClient and RKQuest to change network activity indicator on requests

Added flag to enable RKClient and RKRequest to show network activity indicator when performing a request.

This is done by setting the showNetworkActivity flag to YES before the request is performed.
This is useful when the user is not using RKObjectManager when performing requests since RKRequest doesn't handle it automatically.