Docs for mapping operation data source. Still don't love the method names. Maybe we can eliminate this somehow...

Code/ObjectMapping/RKObjectMappingOperationDataSource.m

@@ -5,13 +5,25 @@
 //  Created by Blake Watters on 7/3/12.
 //  Copyright (c) 2012 RestKit. All rights reserved.
 //
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
 
 #import "RKObjectMappingOperationDataSource.h"
 #import "RKObjectMapping.h"
 
 @implementation RKObjectMappingOperationDataSource
 
-- (id)objectForMappableContent:(id)mappableContent mapping:(RKObjectMapping *)mapping
+- (id)mappingOperation:(RKMappingOperation *)mappingOperation targetObjectForRepresentation:(NSDictionary *)representation withMapping:(RKObjectMapping *)mapping
 {
     return [mapping.objectClass new];
 }