[Kde-imaging] New design for Kipi::Interface.

[Aurelien Gateau]

Hi!

Your design sounds nice to me. I was indeed thinking yesterday that the design 
we came up on IRC was not optimal, and was thinking about something using 
clone() methods, but using shared data would be much better that my idea. 

Could we just rename the "*Host" classes to "*Shared"? This makes more sense 
to me.

Regards,
  Aurélien