* Rewrite the triangular solver so that we can take advantage of our efficient matrix-vector products:

=> up to 6 times faster !
* Added DirectAccessBit to Part
* Added an exemple of a cwise operator
* Renamed perpendicular() => someOrthogonal() (geometry module)
* Fix a weired bug in ei_constant_functor: the default copy constructor did not copy
  the imaginary part when the single member of the class is a complex...

Eigen/src/Core/CwiseNullaryOp.h

@@ -450,7 +450,7 @@ Derived& MatrixBase<Derived>::setOnes()
   * This variant is meant to be used for dynamic-size matrix types. For fixed-size types,
   * it is redundant to pass \a rows and \a cols as arguments, so Identity() should be used
   * instead.
-  * 
+  *
   * \addexample Identity \label How to get an identity matrix
   *
   * Example: \include MatrixBase_identity_int_int.cpp