AppImages in archives

__Dear upstream developer__, if you are reading this then chances are someone tried to add your application to this central catalog of AppImages but could not do so because your AppImage was wrapped inside an archive, such as `.zip` or `.tar.gz`.

Please do not put an AppImage into any sort of container. The reasons are explained at https://github.com/AppImage/AppImageKit/wiki/Creating-AppImages#common-mistake.