[fpc-pascal] fpImage resample via interpolation

[Marco van de Voort]

In our previous episode, Graeme Geldenhuys said:
> >
> > I'm curious: who needs more than 13 different image interpolations?
> 
> Someone that writes image editing/manipulation software like Gimp,
> Pixel32, Photoshop etc...  ;-)
> Someone must have though it's important, otherwise there wouldn't
> exist that many interpolations around.

And in general sb without any speed constraints :-)

64-bit per pixel. brrr.