From Chistian Holm:

- move TFileMerger from proof/proofplayer to io/io.
- move TGeoOverlap from geom/geompainter to geom/geom.
as they are indepedent of the packages they were in.
It will also facilitate upcoming packaging for deb and rpm.


git-svn-id: http://root.cern.ch/svn/root/trunk@23880 27541ba8-7e3a-0410-8455-c3a389f83636