Implementation of Object Mapping 2.0 design:

* Removed RestKit from inheritance hierarchy
  * Mappings are implemented as concrete classes
  * Mapper is much more flexible & powerful
  * Much more robust error handling
  * Serialization is reimplemented as an object mapping operation
  * Added ability to serialize to JSON natively
  * Reworked Core Data integration
  * Simplified the codebase substantially

Code/Network/RKClient.m

@@ -43,6 +43,7 @@ NSString* RKMakePathWithObject(NSString* path, id object) {
 			}
 			if ([scanner scanUpToString:@")" intoString:&keyPath]) {
 				NSString* searchString = [NSString stringWithFormat:@"(%@)", keyPath];
+                // TODO: Add warning when the value generated a nil? Only for paths values (i.e. contaning '.')?
 				NSString* propertyStringValue = [NSString stringWithFormat:@"%@", [object valueForKeyPath:keyPath]];
 				[substitutions setObject:propertyStringValue forKey:searchString];
 			}