Merge pull request #3214 from RosettaCommons/jadolfbr/fix_xcode_project
Fix Xcode Project Generation
This PR updates the Xcode project generation, post-protocols.3 split.
It also adds documentation for how to do it, from much trial-and-error.
@weitzner and I will attempt an automated solution - but this is not trivial and will take some generous time to do.