Preparations for a new developers release cycle v02-03

[tmadlener]

BEGINRELEASENOTES

• Major upgrades to external software, most importantly switching from python2 to python3, and to newer version of gcc.
• Update all external software to latest available versions
• Include latest versions of iLCSoft packages
  • CED v01-09-04
  • MarlinFastJet v00-05-03
  • MarlinReco v01-33
  • lcgeo v00-16-08
  • CEDViewer v01-19-01
  • KalTest v02-05-01
  • DDKalTest v01-07
  • LCIO v02-17-01
  • MarlinKinfitProcessors v00-05
  • LCCD v01-05-01
  • GEAR v01-09-01
  • MarlinDD4hep v00-06-01
  • MarlinUtil v01-16-02
  • MarlinTrk v02-09-01
  • MarlinTrkProcessors v02-12-01
  • MarlinKinfit v00-06-01
  • Overlay v00-22-04
  • KiTrackMarlin v01-13-01
  • ForwardTracking v01-14-01
  • LCTuple v01-14
  • ILDConfig v02-03
  • Physsim v00-04-02

ENDRELEASENOTES