Autosave scores

[tashrifbillah]

• separate _save_data(), call it within callbacks
• separate callback for auto_save_data()
• separate html.Div() to absorb the output of auto_save_data()
• added dcc.Interval for firing periodical callbacks

Note

• 30 seconds interval between autosaves
• no autosave for the first 90 seconds after the page/app starts

[tashrifbillah]

Closes issue #34

[tashrifbillah]

Deployed on rc-predict-gen.