This is not yet perfect but should export already the conditional
formatting and a great deal of the styles to xlsx

Still missing:

font export
number format export
some advanced conditional formats features

This reverts commit a4bc8046.

This reverts commit e1520a9d.

They are only linked to libunordf anyway, so we reduce the number of
shared libraries a bit this way.

Build error on tinderboxes.

* Named expression must be updated before any formulas that would access them.
* Handle all ocName tokens differentiating between global and sheet-local
  names.

...which required switching service implementations from XMultiServiceManager-
based to XComponentContext-based (using comphelper::ComponentContext convenience
helper for the occasional service instantiation via the XComponentContext).

its not evident to me why the original code needed to be so complicated.

At least that is how it seems to work in the old build system:
LINFLAGSRUNPATH_OXT in solenv/inc/unxmacx.mk is empty, just like for
other platforms . On the other side, macosx-change-install-names.pl only
lists OXT in combination with URELIB... Now choose :-)

I need to write a xml diff with configurable tolerance for attributes