Merge branch 'release/0.20.0-pre4' into development
Bump VERSION to pre5 for development
Remove extraneous assert on deletion case
Expand test coverage on managed object deletion cases and fix bugs. closes #358
Set AFNetworking headers to Public for OS X Framework target
Hook the `RKManagedObjectMappingOperationDataSource` into the Managed Object Context save lifecycle to avoid the creation of duplicate objects during sequential mapping operations
Add support for logging the elapsed time. Guard against attempts to log non-HTTP request operations.
Add note about escaping path patterns to the main RKObjectManager.h header docs. refs #1091
Add test case for mapping a future date string
Future date test
Add optional support for connecting to subentities. fixes #1059
Add support and tests for inferring entity identifiers from superentity user info. closes #954
Add a unit test for concurrent mapping of managed object request operations targetting the same unique Core Data objects. closes #1079
More explicit installation directions

Made explicit some instructions that required prior understanding of cocoapods in order to understand.
Add truncation example code to the resetPersistentStores block
Clean up registration of the bundled MIME Type implementations. refs #1097
Merge pull request #1096 from wbarksdale/patch-1

More explicit installation directions
More explicit installation directions

Made explicit some instructions that required prior understanding of cocoapods in order to understand.
Improve the error messages for failure to match any key paths in the mapper
Change to future date test spec