BF: AStarNoiser did not pass the seed to the super constructor.
RF: Abandon NotImplementedError in favour of @abc.abstractmethod.
Merge pull request #218 from Debilski/feature/noiser-fixes
RF: Style.
RF: ‘create_CTFUniverse’ → ‘CTFUniverse.create’.
Merge pull request #219 from Debilski/feature/Universe.create
RF: Remove the global moves list. This is only relevant for a universe.