Add tags for the project

[tyrell-wallace]

Found this on alternativeto.net, but it would be great to have this project properly tagged on github with at least the "qemu", "qemu-gui", "kvm", "python", "virtualization", "emulator" and "virtual-machine" tags.

[yeppiidev]

Hello! This was just a toy project, nothing serious. Hence I did not put much effort into this repo. Cheers :)