Return devices array to the done callback in device list command

Useful when using the CLI programatically.

build/actions/device.js

@@ -41,7 +41,7 @@
           return done(error);
         }
         console.log(visuals.widgets.table.horizontal(devices, ['id', 'name', 'device_type', 'is_online', 'application_name', 'status', 'last_seen']));
-        return done();
+        return done(null, devices);
       });
     }
   };

lib/actions/device.coffee

@@ -49,7 +49,7 @@ exports.list =
 				'last_seen'
 			]
 
-			return done()
+			return done(null, devices)
 
 exports.info =
 	signature: 'device <name>'