Add quotes to build output

plum/service.py

@@ -115,7 +115,7 @@ class Service(object):
         return container_options
 
     def build(self):
-        log.info('Building %s from %s...' % (self.name, self.options['build']))
+        log.info('Building %s from "%s"...' % (self.name, self.options['build']))
 
         build_output = self.client.build(self.options['build'], stream=True)