- Expose the script filename in the Python module environment 'mod_env'

instead of the config_file structure which includes the linked list
  of scripts in a multi Python module setup; fixes #79.

pythonmod/ubmodule-msg.py

@@ -35,7 +35,7 @@
 import os
 
 def init(id, cfg):
-    log_info("pythonmod: init called, module id is %d port: %d script: %s" % (id, cfg.port, cfg.python_script))
+    log_info("pythonmod: init called, module id is %d port: %d script: %s" % (id, cfg.port, mod_env['script']))
     return True
 
 def deinit(id):