GTK4 viewer for PPUB files

Billy Barrow 5b3b77f2ad Better video support %!s(int64=2) %!d(string=hai) anos
src 5b3b77f2ad Better video support %!s(int64=2) %!d(string=hai) anos
.gitignore e64fe53aa0 Initial commit %!s(int64=2) %!d(string=hai) anos