Fixed deduction of archive name.

When in different directory, the archive name and config need to be
treated differently. This commit unify behavior for both cases.

Also, changing a bit logging format and added some more debugging
messages.

fs_uae_wrapper/wrapper.py

@@ -27,7 +27,8 @@ def setup_logger(options):
             level = logging.DEBUG
 
     logging.basicConfig(level=level,
-                        format="%(asctime)s %(levelname)s: %(message)s")
+                        format="%(asctime)s %(levelname)s\t%(filename)s:"
+                        "%(lineno)d:\t\t%(message)s")
 
 
 def parse_args():