Fix canonization of the alphatree and watershed hierarchy
The canonization was not canonizing the nodes at level 0 in the alphatree and watershed hierarchy (#82 (closed)). This problem is solved.
- Fixing the canonization issue #82 (closed)
- Correction of the tests
Futhermore, some minor changes:
Correct the documentation issue for
- Add a propagation option to the component tree attribute function computations