Prep demo project
Basic subclass pattern for RZDataImporter common interface
Unit tests for coredata manager fetch
Change mapping cache to mutable dictionary, allow externally setting mapping
Import for non-relationship objects, fix date formatting in importer
Move singleton accessor to base class
Relationship import working for core data manager
Fix singleton accessor
Update diff method of RZDataImporter to not actually modify objects, just provide diff info
Ensure returned object in import block is from main MOC
Modify importing to support arrays, relationship plist must provide id key
Test for importing object with fully-qualified relationship dicts
Automatically determine model property types
Implement mechanism for providing default data/model ID keys
Rename base class file with _Base so it's more obvious that it's not to be used directly
Move model object protocol to its own file, rename to RZDataManagerModelObject
Correct property type checking and conversion test
fixed relationship import bug
Merge pull request #4 from Raizlabs/ND-GenericInterface

Refactor to support multiple persistence models
Cherry-pick default date format for RZDataImporter