Add test coverage verifying fix for crash during cyclic graph traversal in `RKManagedObjectRequestOperation`. closes #1142
Add temporary workaround for infinite recursion
Radically simplify the implementation of managed object deletion and refetching within `RKManagedObjectRequestOperation`. closes #1163

1. Eliminates use of visitor in favor of aggregating mapping info during mapping. This avoids having to traverse the mapping graph.
1. Eliminate special case handling of cyclic key paths.
1. Eliminate issues with infinite recursion while traversing the mapping graph.
Remove unnecessary exception handling for `NSUndefinedKeyException`
Copy `attributeCaches` to avoid potential for mutation during enumeration
Encapsulate managed object refetching into an NSProxy object to enable you to defer the refetching until the mapping result is accessed (or skip it entirely if the result is not accessed)
Nil out `targetObjectID` if given a `targetObject` that is not an `NSManagedObject`. closes #1161
Add test case for empty 5xx response. refs #1169
Fix failed assertion when constructing an unprocessable response error for 5xx errors. closes #1169
Fix missing language in log message
Add unit test and fix for crash during eviction of cache keys during query for compound identification attributes. closes #1171
Add test to verify managedObjectContext on empty results.
Fix bug with refetching due to failure to track applied attribute mapping when mapped value is unchanged. closes #1176
Add warning about deadlocks if you use `waitUntilFinished` with a RKManagedObjectRequestOperation on a main queue thread. refs #1173
Add missing EOF in ObjectMapping.h
Fix a typo in code example

objectRequesOperationWithRequest ->
objectRequestOperationWithRequest
Merge pull request #1182 from darashi/fix-typo-in-readme

Fix a typo in code example
Add missing copy support for the entity and deletion predicate. closes #1184
Fix potential crash due to serious Core Data error from failing to obtain a permanent objectID for an object that was just saved to the persistent store, but whose `objectID` is stale. fixes #1183
Tweak docs, add test cases for mapping a response with a descriptor that does not specify any attributes/relationships