TPacketizerAdaptive
    - Better to use TDSetElement::GetNum() instead of TDSetElement::GetEntries() for the
      recent packetizer optimization (includes cases where fractions of files are processed)
   runProof
    - Add option 'uneven' to tutorial 'eventproc' to simulate some uneveness in the entries
      per file
    - Solve a few issues with formats


git-svn-id: http://root.cern.ch/svn/root/trunk@34533 27541ba8-7e3a-0410-8455-c3a389f83636