Add support for .xz compressed file
Files (Nautilus) app provides GUI option for compressing files to .tar.xz via context menu > Compress > .tar.xz. Also, .xz normally results in less file size than .bz2 or .gz. IMHO, it would be interesting to include support in D-L for attaching .xz file to the modules' actions (e.g. adding an image XZed tarball).