[Fix] `touch` command fails on paths with spaces
[Fix] `Last-Translator` fails with custom User class

Building the `Last-Translator` string fails if the User class doesn't
have `first_name`, `last_name` or `email`.
We pass building the data if a UnicodeDecodeError occurs. I think we can
skip building these data when a custom User class is being used as well
(for now).
[Fix] `django.conf.urls.defaults` has been removed in django 1.6
[Fix] Rendering function in django 1.6