Changes

0.4.1 (unreleased)

Nothing changed yet.

0.4.0 (2017-06-20)

Python 3 support
When asking for updates from generation 0, only adds are sent. Never removals, making this common case more efficient.

0.3.0 (2014-08-28)

Added a changed method to make intent clear when simply recording changes.
Fixed: exceptions were raised when objects added to generational sets quacked a little like generational sets.

0.2.0 (2014-08-10)

Improved subset APIs:
- No longer need to specify superset flag.
- Can have set and non-set children.
- A subset can be created without a parent and the parent will be set when it's added to a containing set.

0.1.2 (2014-06-09)

Fixed: Internal data structures were misshandled when there were more: than the maximum number of removals.

(Release 0.1.1 was made in error.)

0.1.0 (2014-06-08)

Initial release