[Paraview] paraview plugin for vtkImageGaussianSmooth

[Utkarsh Ayachit]

> You are correct, you'd need to write a little plugin to use it in
> pvpython or the GUI. You can simply write an XML plugin. It should be
> fairly simple for vtkImageGaussianSmooth, it doesn't seem to have any
> complex properties.

I just saw Burlen's response and yes, I missed the fact that
vtkImageGaussianSmooth changes extents in which case things do get
complicated, as Burlen suggests.

Utkarsh