Write unit tests in order to show a bad access issue on iOS 6.1 and below, when cookies are enabled and URL is nil on a request.
Merge branch 'cookie-nil-url-unit-tests' of https://github.com/SBiOSoftWhare/OHHTTPStubs into SBiOSoftWhare-cookie-nil-url-unit-tests
Fixing issue with cookies when nil request.URL on iOS6
Fixing missing -ObjC flag in Unit Tests (making categories fail to load)
Prevent Unit Tests that involves NSURLSession to be run when we execute the Unit Tests by targeting iOS6 Simulator instead of iOS7 Simulator (as NSURLSession is not available in iOS6 which makes those tests pointless)