Scaling down removes containers

Squashed version of #162.
Closes #121.

fig/cli/main.py

@@ -298,20 +298,13 @@ class TopLevelCommand(Command):
         """
         detached = options['-d']
 
-        (old, new) = self.project.recreate_containers(service_names=options['SERVICE'])
+        new = self.project.up(service_names=options['SERVICE'])
 
         if not detached:
             to_attach = [c for (s, c) in new]
             print("Attaching to", list_containers(to_attach))
             log_printer = LogPrinter(to_attach, attach_params={"logs": True})
 
-        for (service, container) in new:
-            service.start_container(container)
-
-        for (service, container) in old:
-            container.remove()
-
-        if not detached:
             try:
                 log_printer.run()
             finally: