handling because the actual pattern images had to be written too.
So the KoShapeSavingContext now has functions to add the pixmaps and
write them later to the odf store. I added a helper class 
KoShapeStyleWriter for handling the shape style adding and writing of
the office:styles styles for convienience. Added a new StyleFillImage
style type to KoGenStyle for fill-image styles.


svn path=/trunk/koffice/; revision=694516