done all the scene...
Merge branch 'dev' of https://github.com/us4us/seed into dev
Merge branch 'hbzhou' into dev
Merge branch 'hbzhou' into dev
Merge branch 'hbzhou' into dev
Merge branch 'hbzhou' into dev
Merge branch 'hbzhou' into dev
done following:
    1. same datastruct local CoreData and Rails Database
    2. sync CoreData with Rails Database
Merge branch 'dev' of https://github.com/us4us/seed into dev
Add checkout/:id function and test.
Merge branch 'dev' into hbzhou