Rician noise addition improvements

Mainly remove the restriction of noise addition to allow zero voxels to have some noise too as it is supposed to.
The random seeding was badly handled. It has ben fixed and a cout show the seeding point to make sure it is different every time

sorry yea you can remove the commented ones and the then obsolete 
brackets ;-)

On 25/06/2014 14:36, Florian Vichot wrote:
>
> In Commands/itkAddRicianNoiseToImageCommand.cxx:
>
> > @@ -88,8 +87,13 @@ namespace itk
> >      if (IsReproducible)
> >        seed = 5323;
> >      else
> > -      seed = (int) time(NULL);
> > -
> > +    {
> > +      // time_t timer;
> > +      // time (&timer);
> > +      seed = (int) time (NULL);
>
> I see no difference with the previous code, are those lines supposed 
> to be commented ?
>
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> <https://github.com/Inria-Asclepios/TTK-Public/pull/3/files#r14185281>.
>