Favorites and Watch progress API

Add favorites and watch progress api. also add some new tables in database.

Fix the session issue by implementing a database session storage.

New Scheduler support get feed from dmhy and acg.rip. also provide a flexible way to implement any new site support.

An info scanner is added to auto fill missing information

See changelog

local cover support

fix #12
fix #7
Bangumi cover image now serve from local server

The new home

A New Home Page is added and some new home api is added as needed.
fix many bugs

Add many features

See changelog

The alpha is ready

This version is the first release