improved searching again

Yes, we are still improving the seach-functionality.

Now you can use different national shortcuts
like "rd." for "road" and other things like "Kaiser Joseph strasse" to find the "Kaiser-Joseph-Straße".
Name-handling, comparison and normalization ae now
handled by a central helper and no longer re-implemented in each DataSet-implementation.

Once OpenStreetMap agrees on a schema to save
house-numbers and national borders they will make
our address-search complete.