Fixed nearly all broken tests for OS X target

Code/Support/RKDirectory.h

@@ -0,0 +1,30 @@
+//
+//  RKDirectory.h
+//  RestKit
+//
+//  Created by Blake Watters on 12/9/11.
+//  Copyright (c) 2011 RestKit. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+/**
+ iOS and OS X agnostic accessors for safely returning directory paths for use 
+ by the framework and applications.
+ */
+@interface RKDirectory : NSObject
+
+/**
+ Returns the path to the Application Data directory for the executing application. On iOS,
+ this is a sandboxed path specific for the executing application. On OS X, this is an application
+ specific path under NSApplicationSupportDirectory (i.e. ~/Application Support).
+ */
++ (NSString *)applicationDataDirectory;
+
+/**
+ Returns a path to the root caches directory used by RestKit for storage. On iOS, this is
+ 
+ */
++ (NSString *)cachesDirectory;
+
+@end