proofplayer → io Relation

File in proof/proofplayer	Includes file in io
src / TEventIter.cxx	io / inc / TFile.h
src / TEventIter.cxx	io / inc / TKey.h
src / TPerfStats.cxx	io / inc / TFile.h
src / TProofPlayer.cxx	io / inc / TFile.h
src / TProofPlayer.cxx	io / inc / TFileMerger.h