DONE (36H): New Features: auto sigin and data syncronization

[kaishen2018]

• 1. Use the login page as the default page when open a app. - Done
• 2. Auto sync data between app and website when user login. 2 synchronization job as below - Done
     • Auto upload data into website from APP DB
     • Then auto download data into APP DB from website
• 3. Keep user login status even user close the app, unless user click the sign-out button. - Done
• 4. When user reopen app,
     • automatically sign-in if with network, and do data synchronization of step 2
     • Automatically log-off user if no network.

[kaishen2018]

-- + 16 H

[kaishen2018]

DONE -- + 20 H