Add countermeasure to avoid crash in `cxx_destruct` during deallocation of mapping result
Bump versions on bundler and debugger gems
Bump pod lock file per new cocoapods version
Update baseURLs to fix issues with Twitter example projects. closes #1273
Add `NSURLConnectionDataDelegate` to protocol declaration for AFURLConnectionOperation to avoid compiler error in some cases. closes #1249
Remove wasNotModified method in favor of setting a flag on cached response entries to determine if mapping can be skipped.
Add support for retrying `RKObjectRequestOperation` and `RKManagedObjectRequestOperation` by conforming to `NSCopying`. closes #1224
Remove noisy params logging from test server actions
Move management of RKResponseHasBeenMapped to RKObjectRequestOperation instead of RKManagedObjectRequestOperation. Add unit tests.
fix: To one relationships, that have a nested destination keypath are not correctly mapped to JSON
Fix intermittent crashes during test execution
Introduce a new heuristic based approach for determining if a response can skip the mapping process. Also introduces a new Network + CoreData logging component and reduces the chattiness of the debug logging level for Core Data Network events.
Fix RKReplaceAssignmentPolicy.  The problem was that new values for the relationship were gathered before the old values were deleted.  Therefore if one of the new values was the same as the old value, the valueForRelationship collection would contain a deleted managed - not good.

Also fixed:
* The if statement near line 674 was incorrectly negated
 * Setting the relationship value around line 676 was redundant since it was done in the mapCoreDataToManyRelationshipValue:withMapping method.
Improve documentation regarding registration of transformation blocks. closes #1270
Unescape URL metadata mapping parameters if route required parameter escaping
Fix function declaration for RKCacheableStatusCodes
Add documentation regarding revised implementation of 304 (Not Modified) optimization in `RKManagedObjectRequestOperation`
Fix broken test coverage for 304 (Not Modified) optimization
Add test coverage for connection of objects with temporary ID's. closes #1227
Configure `RKManagedObjectImporter` to set the mapper operation instance as the parent operation for the `RKManagedObjectMappingOperationDataSource` instance. This enables relationship connection between objects that are created without an intervening save.