0.5.6:
	* Tutorial completed
        * Small fixes, tests
0.5.5:
	* Adapter tutorial
	* Default implementations for accessors in generic adapter
0.5.4:
	* Display convention: also Francophone-style
	* Added 2 adapters for Skew Partition and Skew Tableau
	* Added a specialized class for partitions: PartitionGridViewWidget
