enable raise in MPRIS; Fixed: CmdSource removed
Fixed: memory leak, old css_provider deleted automatically
debug info removed
Add: can delete old css_provide in apply_css()
Automatically load next song when error occurs
v3.1.3 released
keybindings added
reset volume in Shortcut
v3.1.4 released
python3-keybinder and python3-xlib is optional now
add command lines to show how to install other python3 modules
Select None by default
songs in Cached playlist are deletable