add ansible.cfg a la mrled; same sane defaults, basically.

ansible/anisble.cfg

@@ -0,0 +1,12 @@
+[defaults]
+inventory = hosts.yml
+pipelining = True
+retry_files_enabled = False
+stdout_callback = yaml
+
+[ssh_connection]
+scp_if_ssh = True
+retries = 1
+
+[privilege_escalation]
+become = True