rename planetstack module to xos
diff --git a/planetstack/util/logger.py b/planetstack/util/logger.py
index e4137e7..b88d233 100644
--- a/planetstack/util/logger.py
+++ b/planetstack/util/logger.py
@@ -39,7 +39,7 @@
         # default is to locate loggername from the logfile if avail.
         if not logfile:
             try:
-                from planetstack.config import Config
+                from xos.config import Config
                 logfile = Config().observer_log_file
             except:
                 logfile = "/var/log/planetstack.log"