Huge refactoring

Split scripts and instructuins into two parts: lab preparation and
deployment.

vagrant-scripts/provision-master.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+echo master > /var/tmp/role
+
+# SSH keys and config
+sudo rm -rf /root/.ssh
+sudo mv ~vagrant/ssh /root/.ssh
+sudo echo -e 'Host 10.*\n\tStrictHostKeyChecking no\n\tUserKnownHostsFile=/dev/null' >> /root/.ssh/config
+sudo chown -R root: /root/.ssh
+
+# README
+sudo echo 'cd /root/kargo ; ansible-playbook -vvv -i inv/inventory.cfg cluster.yml -u root -f 7' > /root/README