update Transform::inverse() to take an optional argument stating whether the transformation is:

NonAffine, Affine (default), contains NoShear, contains NoScaling
that allows significant speed improvements. If you like it, this concept could be applied to
Transform::extractRotation (or to a more advanced decomposition function) and to Hyperplane::transformed()
and maybe to some other places... e.g., I think a Transform::normalMatrix() function would not harm and
warn user that the transformation of normals is not that trivial (I saw this mistake much too often)

Eigen/Geometry

@@ -25,6 +25,7 @@ namespace Eigen {
 // the Geometry module use cwiseCos and cwiseSin which are defined in the Array module
 #include "src/Array/CwiseOperators.h"
 #include "src/Array/Functors.h"
+#include "src/Array/PartialRedux.h"
 
 #include "src/Geometry/OrthoMethods.h"
 #include "src/Geometry/Quaternion.h"