Add a heuristic to determine if we can skip merging a `NSManagedObjectContextDidSaveNotification` to avoid merging changes that are already available. refs #1351
Fix link to tutorial

The tutorial seems to have been moved from the wiki.
Fix intermittent crash do to use of `isNew` from outside the managed object context queue
Merge pull request #1372 from fernandotcl/patch-1

Fix link to tutorial
Improve docs for tombstone deletion. closes #1379
Merge remote-tracking branch 'origin/bugfix/1351-ghost-objects-in-merge-notifications' into feature/1232-improve-performance
Set a maximum operation count of 50 within the importer so that very large import operations do not die due to resource exhaustion
Apply a few small optimizations to the fetch request cache

* Optimize single identification attribute computation
* Replace `NSCache` with dispatch queue guarded dictionary
Merge branch 'feature/1232-improve-performance' into development
Do not attempt to do a value comparison for the `modificationKey` if the mapped value is `nil` after transformation
Improve object request operation info logging to include break out of times (request, mapping, total). closes #1380
Fix accuracy issues in new logging messages
Guard against inserting `nil` into `userInfo` dictionary
Handle mapping did finish being null in logging reporter
Bump to CocoaPods 0.19.1
Log core data save error
Add Bitdeli badge
Use `performBlockAndWait:` to avoid duplicates when adding to the cache. refs #1079
Fix crash in tests due to fetch request cache changes
Fix intermittent test failures/crashes