Gael Guennebaud 0ee6b08128 * split Product to a DiagonalProduct template specialization ...

to optimize matrix-diag and diag-matrix products without
  making Product over complicated.
* compilation fixes in Tridiagonalization and HessenbergDecomposition
  in the case of 2x2 matrices.
* added an Orientation2D small class with similar interface than Quaternion
  (used by Transform to handle 2D and 3D orientations seamlessly)
* added a couple of features in Transform.

2008-06-15 11:54:18 +00:00

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