[scribus] Import CMYK colours correcting from SVG/EPS

[Peter Nermander]

I think that what some people here seem to forget is that neither an
RGB-value nor a CMYK-value really represents a physical color. They
are not device independant.

To get a physical colour from an RGB or CMYK value you need a
colorspace. The colorspace is the cross reference between numerical
values (RGB or CMYK) and physical colors.

I think that is part of the reason that the values change.

Also CMYK colors can be adjusted by for example under color removal
without losing their hue.

/Peter