Fix: jgoodies 1.4 no longer accepts RowSpec(string) constructor.

The constructur which is now used is valid for jgoodies 1.2 and 1.4.
Change english text for exports into Microsoft formats.

This is now more concice (prefixed by "Microsoft") and the same as
LibeOffice does.
German translation updates.
Merge pull request #15 from htgoebel/jgoodies_1.4

Fix: jgoodies 1.4 no longer accepts RowSpec(string) constructor.
Merge pull request #16 from htgoebel/translation_updates

Some German translation updates.