Require all values along JSON key paths to be dictionaries
Remove headers from targets
Rename to -mtl_valueForJSONKeyPath:success:error:
Rename variables
Use subscripting syntax
Reorder imports
Document key path lookup behavior
Actually rename to -mtl_valueForJSONKeyPath:success:error:
Merge pull request #275 from MantleFramework/dictionary-paths

Require every element along a JSON key path to be a NSDictionary