Please consider providing all the data files in a separate zip for each release, for instance:
(or freeorion-0.4.2-data.tar.xz, for more efficient compression)
This would be of great help when packaging Freeorion for Arch Linux, since most of the time is spent waiting for all the data files to check out from subversion.
It would also make it easier to package the data files separately, and let people upgrade just the client and not all the data.
The result would be more efficient packaging and less bandwith use for everyone.
Several other games releases it this way.
Please consider releasing such a zip file for each release.