Update project settings to enable easier symbolication. closes #1277
Add workaround to avoid potential crash during execution of deletion operations on iOS 5. closes #1266
Bump CocoaPods to 0.16.4
Bump Gem dependencies
Add assertions to `RKMIMETypeSerialization` and `RKTestFixture`
Rework deletion operations to avoid deleting objects that would be valid if mapping we allowed to assign them to the desintation relationship. refs #1225
Add currentOffset to RKPaginator
Make deletion of newly inserted objects that fail validation configurable. closes #1281
Added test case for NSMutableSet mapping on managed object. refs #1201
Fix test breakage under Mac OS X
Added test cases attempting to reproduce duplicated objects issue. refs #1228
Fix small typo in README
Fix incorrect serialization of a single object inputted as an array. closes #1289
Bump version to 0.20.0
Update Podspec to v0.20.0
Merge branch 'release/0.20.0' into development