[KPhotoAlbum] Eliminating unneessary information in index.xml

[Johannes Zarl-Zierl]

On Sonntag, 4. Juni 2017 21:15:13 CEST Robert Krawitz wrote:
> Obviously, if there's no setting to control this, it will break
> forward compatibility (i. e. an older kpa won't be able to correctly
> read a newer index.xml).  But we're at the point now where it's going
> to be hard to get really big improvements.

I'm going to postpone this patch for a little bit. In case any other changes 
to the index.xml format pop up in the meantime, we can bundle them into a 
single version bump...

Cheers,
  Johannes