Use Xcode 6.4 on travis
Use Xcode 6.4 on travis

NSProgrammer/ZipUtilities,NSProgrammer/ZipUtilities,tanneroakes/ZipUtilities,tanneroakes/ZipUtilities,NSProgrammer/ZipUtilities,tanneroakes/ZipUtilities,NSProgrammer/ZipUtilities,tanneroakes/ZipUtilities