-Add the following new functions that are required to complete the separation
of base and cont from the I/O sub-system. Some of these functions were
implemented (temporarily) in the now obsolete class TVirtualIO/TFileIO.
   // Special basic ROOT objects and collections
   virtual   TProcessID *GetLastProcessID(TRefTable *reftable) const = 0;
   virtual   UInt_t      GetTRefExecId() = 0;
   virtual   TProcessID *ReadProcessID(UShort_t pidf) = 0;
   virtual   UShort_t    WriteProcessID(TProcessID *pid) = 0;

   // Utilities for TClonesArray
   virtual   void     ForceWriteInfo(TClonesArray *a) = 0;
   virtual   Int_t    ReadClones (TClonesArray *a, Int_t nobjects) = 0;
   virtual   Int_t    WriteClones(TClonesArray *a, Int_t nobjects) = 0;


git-svn-id: http://root.cern.ch/svn/root/trunk@17537 27541ba8-7e3a-0410-8455-c3a389f83636