changed Error code when response mapping declined with `willMapDeserializedResponseBlock` block
Migrate RKValueTransformers and ISO8601DateFormatter into standalone libraries
Remove warning log message that is likely to produce log flooding
Fix issue with inappropriate handling of managed objects using `nil` key path. fixes #1596
Switch `RKValueTransformers` and `ISO8601DateFormatterValueTransformer` to HTTP submodule URL's
Fix memory leak in state machine. closes #1593
Fix documentation issue on `addAttributeMappingToKeyOfRepresentationFromAttribute:` and transparently transition to using braces instead of parentheses for denoting variables in key paths. closes #1449
Merge pull request #1570 from almassapargali/development

changed Error code when response mapping declined with `willMapDeserializedResponseBlock` block
Rename and deprecate some poorly named properties on `RKObjectMapping`
Bump VERSION to 0.21.0
Update RestKit to build and run tests using CocoaPods instead of the static library / framework targets
Integrate tests verifying the behavior of using an externally integrated value transformer for mapping and object parameterization
Fix test breakage from mapping configuration property renames
Bump to CocoaPods 0.25.0
Consider assignment policies when mapping missing relationship values. fixes #1505
Fix ETag capitalization issues. closes #1597
Make test for RKReplaceAssignmentPolicy reject RKUnionAssignmentPolicy - due to operator precedence, it wasn't.
Don't reuse deleted objects when mapping a relationship without identificationAttributes
Merge pull request #1617 from percysnoodle/replacement_deletion_fix

Don't reuse deleted objects when mapping a relationship w/o identificationAttributes
Added support for seed databases using WAL