Apple has posted a Q&A on XcodeGhost, the counterfeit software development kit that was used to create malicious apps that were able to be released on the App Store. As expected, the Q&A emphasizes that the problem was created by developers downloading iOS software development tools from third-party sites, rather than Apple’s, but also interestingly notes that OS X protections that Apple has put in place — such as Gatekeeper — had…