API

- http://127.0.0.1:8080/api/guestbook/default_guestbook/greeting
-
http://127.0.0.1:8080/api/guestbook/default_guestbook/greeting?cursor=XX
X
Add default value to fetch

Add default value to fetch
Check None of updated_date

Check None of updated_date
Check error when query

Check error when query
API: Get detail of Greeting

API: Get detail of Greeting
API: Get list, detail Greeting

Handle error
API Create greeting
API Create Greeting

Change import lib
API Update greeting
Update Greeting

Update Greeting
API - Edit Greeting
API : Delete
Fix comment

- Prefix _ before method is use only for internal class
- Define method render_to_response() in parent class
- Add comment
Fix comment

- Remove method get, because we dont override this method
- Arrange methods for understanding
change method render_to_response
Merge pull request #13 from nhathv/feature/api

Merged pull request #13 Feature/api