Fixed python 2.5 does not having the followlinks option for os.walk.
Fixed python 2.5 does not having the followlinks option for os.walk.

linked/django-mediagenerator,Carlangueitor/django-mediagenerator,adieu/django-mediagenerator,linked/django-mediagenerator,Carlangueitor/django-mediagenerator,adieu/django-mediagenerator,linked/django-mediagenerator