Base example `webhost-gitusers-dokuwiki` on `vagrant-multi-machine`.
Fix typo.
Git-ignore `vagrant_ansible_inventory`.
Fiy typo.
Add a very simple test-playbook.
Fix ssh-connection-errors: Add a ansible_config_hook to .debops.cfg.
Port latest changes to vagrant-multi-machine.
Update Readme: describe usage of `ansible_config_hook`.
Correct .debops.cfg-files: switch of host-key-checking.

This is what I wanted from the beginning.
Remove test-playbook for vagrant-multi-machine.

There already is `site.yml` which does more reasonable simple tests.
Rename playbook `site` to `simpletest`.

This is what is written in the README.