added support for monitor ssh keys (requires latest leap_cli)
monitor nodes get all nodes listed in /etc/hosts
deploy a valid /etc/ssh/ssh_known_hosts for all nodes (requires new leap_cli)
turn off StrictHostKeyChecking for vagrant ssh clients
Merge remote-tracking branch 'elijah/feature/known_hosts' into 0.6

Conflicts:
	provider_base/services/monitor.json