- convert the Fedora 20 examples to Fedora 25
- convert the yum examples to dnf
- convert the Debian 7 examples to Debian 8
- mention that --core updates all the installed packages, not "core"
ones
- convert i386 to i686 for the Fedora 32bit examples
- mention that autogenerated root passwords are printed on stdout
- mention --get-kernel is deprecated in favour of virt-get-kernel
- update URL to the Puppet installation documentation
- edit the repository index documentation to make it clearer
non-compressed templates are supported
- remove old wrong paragraph about customization specified in command
line not processed in the same order
- use --install instead of --run-command '$pkgmgr install ...'
- other minor changes