removed some references to Cocoa when Objective-C is meant

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Xcode: fixed compilation and llvm debugging from within Xcode 6

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Merge branch 'master' of ssh://git.goldelico.com/swk