KDEPrint code cleanup

[Michael Goffioul]

> Sorry -- that just doesn't cut it for breaking BC.  If you install headers and 
> do not explicitly mark them as private, assume that they are and will be used 
> as part of the public API and that BC rules apply.
> 
> "I didn't document them" doesn't make them any less public.

This was not an argument, simply an explanation of why they
are not documented. Anyway, I don't have the will nor the
time to fight against that, and as I said, I won't change
anything (next planned change should then occur for 4.0)

Michaël.

PS: to my knowledge, KBarcode is the only app making use of
     those internal KDEPrint headers (but I guess they might
     be others).

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Michael Goffioul		IMEC-DESICS-MIRA
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