GitLab

* Api fixes: Add `.uid` property to GraphNode

* Api fixes: Fix default node factory

* Api fixes: Fix str(graph) when no `name`

* Api fix: add obj.format_fitness

* Api fixes: Fitness comparison between SO & MO

* Api fixes: fix pop size with offspring rate

* WIP test on ser

* Api fixes2: Few renames

* Api fixes2: Few renames (2)

* Api fixes2: fix license in setup.py

* review fixes

* fix tests

* fix tests

* fix docs

* fix max pop_size