[Kst] extragear/graphics/kst/src/plugins/interpolations

[Brisset, Nicolas]

This series of plugins seems to be a good candidate for grouping. I
think it would be nice to have an extended plugin providing its own UI
(with a combobox to select the type of interpolation and type-specific
parameters). That would also help others get started writing more
powerful plugins with custom UIs, as a good example is worth a lot of
documentation ! Plus, it would allow to check that the new plugin system
provides all that's needed (though I guess you have checked that
already). Are there actually plugins in trunk that provide custom UIs
right now ?

> SVN commit 613318 by treat:
> 
> * Convert all the interpolation plugins to the new scheme.  
> Redo the common algorithm.
> [...]