I created a Linux AppImage for Cura 21.08 for old Taz's

Since lulzbot dont give two ***** anymore. I made an appimage for linux for cura 21.08, since I still run a Taz 2 from back in the day and old cura works best.

It works for me, but need some other eyes to test it out… This at least makes it nice for newer linux distros that no longer support old dependancies…