bugfix: no changed signal sent for database playlist_local and playlist_network
qvod_search.js
open file, insert to playlist and play
playlist rewrite
playlist addItem done
add constant property `homeDir' to config
playlist removeItem done
bugfix: app crashes if no ~/.config/deepin-movie dir exists
playlist serialization and deserialization
clear operation
move PauseNotify to Player
getNextSource() finally worked right, and a bunch of bug fixes
addItem redundant insertion check
play in sequence