The patch adds a KoPageProvider that can give back a KoTextPage for
shape. This is done in the paint event of the textshape. It will
relayout the textshape if needed (when the page number changed) and
will block all update calls when doing so to avoid retriggering of
the paint event.

If a application does not offer a page provider the behaviour is the
same as before. It is possible to use this behaviour for selected
shapes only if an app whishes.

BUG: 187838

svn path=/trunk/koffice/; revision=1025130