Django 1.6+: Explicitly passing in timeout=None will set a non-expiring timeout. Passing in timeout=0 will set-and-expire-immediately the value.
removed tabs added by my editor
fixed obvious bug (lack of sleep)
Merge remote-tracking branch 'upstream/master' into django1.6+_special_timeout_values
special timeout values tests (test_locmem only)
added --master and --cache-expire-freq 1 to test_uwsgi options
removed unneeded tests
modified add() + tests
skipping a test for Django 1.6 + using internal _set()
updated AUTHORS.rst
Merge pull request #8 from laurentpayot/django1.6+_special_timeout_values

Conform to Django 1.6+ special timeout values.