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

Examples/RKDiscussionBoardExample/DiscussionBoard/Code/Controllers/DBPostsTableViewController.m

@@ -17,7 +17,7 @@
 
 - (id)initWithTopicID:(NSString*)topicID {
 	if (self = [super initWithStyle:UITableViewStylePlain]) {
-		_topic = [[DBTopic objectWithPrimaryKeyValue:topicID] retain];
+		_topic = [[DBTopic findFirstByAttribute:@"topicID" withValue:topicID] retain];
 		
 		self.title = @"Posts";