Update libphoton
Separate core functionality to libphoton
Fix pointer new api
Fix the surface widget clipping issue
Add calling mpv with direct media link

In video playing cases it's more usefull to call mpv with the direct
item link, so the embedded youtube-dl mpv config can play the video
directly, with the title and all that.
update dependencies
Add article navigation
Update dependencies + new screenshots
Update gio and richtext
Add more sophisticated download file naming
Fix feedInputs pointer to lua