Closes #296

cases with timing. Still needs preprocessor interface (option) and documentation.

in order to use independent smooth resampling; modification of the input of the procedure since
now no partition is required

Previously, the filter was only working with options_.noconstant, i.e. when the
data are centered.

The rationale is that, in the absence of a subsasgn method, MATLAB and Octave
behave differently. The former refuses any data member update, while the latter
allows all. Providing an implementation is therefore required to have uniform
behavior.

Changed options of the estimation command in fs2000_particle.mod (added optimization of the posterior kernel).

In the end the hessian at the mode has the wrong sign...

This leads to a crash when the DLL is called several times in the same
Octave/MATLAB session.

Otherwise it fails with on Karaba

This was necessary to make some tests work again