Ignore invalid scripts instead of firing an exception

A message will be displayed showing the error with the script.
This is useful if the user has extra code in the scripts directory, (like a
settings.py file), that is not intended to be executed by multi-mechanize.

Floqq innovation SL.  www.floqq.com

multimechanize/script_loader.py

@@ -52,7 +52,8 @@ def ensure_module_valid(cls, module):
         """
         problem = cls.check_module_invalid(module)
         if problem:
-            raise InvalidScriptError, problem
+            sys.stderr.write("Cannot import: {0}: {1}\n"
+                               .format(module, problem))
 
 class ScriptLoader(object):
     """Utility class to load scripts as python modules."""