Exit with error code 1 when an exception is thrown

diff --git a/mdk.py b/mdk.py
index 1fae35e..ab8bf45 100755 (executable)
--- a/mdk.py
+++ b/mdk.py
@@ -95,3 +95,4 @@ except Exception as e:
     info = sys.exc_info()
     logging.error('%s: %s', e.__class__.__name__, e)
     logging.debug(''.join(traceback.format_tb(info[2])))
+    sys.exit(1)