Output from ansible should be logged.

The output from `stdout` and `stderr` for all installation steps in ansible currently goes to `/dev/null` as far as I can tell, making troubleshooting mis-configuration very difficult.

See [How do I get logs/details of ansible-playbook module executions?](http://stackoverflow.com/questions/18794808/how-do-i-get-logs-details-of-ansible-playbook-module-executions)



