Each plugin will have a KService factory only one time and it can now
choose from being a Shape-only plugin, a Tool-only plugin or to be
a plugin of type "KOffice/Flake" which can contain both types.

This solves the weirdness that if you had both a shape and a tool
you had to choose one and do some magic in the constructor to have
the other type known as well.

svn path=/trunk/koffice/; revision=604907