3.1.1
Trap AttributeError in Gnome backend as in some environments
it seems that will happen.
Fix issue where a backslash in the service name would cause
errors on Registry backend on Windows.
3.1
``keyrings.alt`` no longer depends on the ``keyring.util.escape``
module.
3.0
``keyrings`` namespace should now use the pkgutil native technique
rather than relying on pkg_resources.
2.4
File based backends now reject non-string types for passwords.
