Deferred specs should run using the latest version of cedar in XCode 6

Several import paths in the Specs target were using import "Cedar.h" which was caused build errors when compiling the Specs target with the newest version of cedar and XCode 6.

Since the Specs target depends on the OSX cedar framework target, I replaced these calls with framework-style import paths and was able to compile and run the Specs target.

If this seems good, feel free to merge it in.