Merge branch 'hotfix/fix-nil-assignment-bug'
Change valueForKey to valueForKeyPath to fix crash on retrieving params names
Merge pull request #1709 from softfacade/master

HotFix crash on stubRoute... in RestKit/Testing
Fix incorrect method name.

The method for uploading images as a multipart form was outdated.
Merge pull request #1727 from zkhalapyan/master

Fix incorrect method name.
managedObject retrieved from managedObjectCache could be deleted.
Test Case Updated
Merge branch '#1802-Don't-reuse-deleted-objects-when-mapping-a-relationship-with-identificationAttributes-and-managedObjectCache' into development-upstream