Allow parsing of unknown arguments

Fixes #1 (closed).

pyzenkit/baseapp.py

@@ -771,7 +771,8 @@ class BaseApp:  # pylint: disable=locally-disabled,too-many-public-methods, too-
         :rtype: dict
         """
         # Actually process command line arguments.
-        cli_cfgs = vars(argparser.parse_args())
+        cli_cfgs, unkw = argparser.parse_known_args() 
+        cli_cfgs = vars(cli_cfgs)
 
         # Immediatelly check for debug flag.
         if cli_cfgs.get(self.CONFIG_DEBUG, False):