Added pod start and stop

As well as added tests, man pages, and completions.
Also reformatted and refactored a couple of other small things in the other pod commands.

Signed-off-by: haircommander <pehunt@redhat.com>

cmd/podman/pod.go

@@ -20,6 +20,8 @@ var (
 			podCreateCommand,
 			podPsCommand,
 			podRmCommand,
+			podStartCommand,
+			podStopCommand,
 		},
 	}
 )