Analysis classes should work with jagged arrays instead of multidimensional matrices

[cesarsouza]

All analysis classes and their interfaces should be refactored to work with jagged arrays instead of multidimensional matrices. This might involve updating some matrix decomposition classes to work with jagged arrays.

[cesarsouza]

All analysis classes now implement the new common interfaces for data transformation (ITransform), Supervised learning (ISupervisedLearning) and Unsupervised learning (IUnsupervisedLearning). Those interfaces now rely exclusively on jagged arrays and the use of multi-dimensional arrays for sample representation is being discontinued.

Fixed on release 3.2.