Python functionality partly restored, but rotation tests isgisaxs07 and mesocrystal1 are crashing in python

  a result; ideally it should not at all change the internal state;
  definitely it should not store the result.
Comments, layout.

This reverts commit e202d1ef.

Status: FitTest02 fails.

- speed as before
- App --isgisaxs07 shows huge difference, but fu.test passes

Extended print() methods.

Ex #09b still fails.

specific implementation RotationZ_3D.
Raw material for all other transforms temporarily moved to
UnusedTransform3D.h.
Status: Core compiles, FunctionalTests not yet.

transform method now in class Transform3D instead of BasicVector3D<>.

'transform' -> 'transformed', no longer in place

Modified API: 'rotate' -> 'rotated', which no longer operates in place.