* Switching Macos64 to clang insteand of g++ in makefile to avoid issue
  with OS X 10.9
* Remove self assignment warning in TMust2Physics (issue warning, not
 affecting logic)
* Remove self assignment warning in TCatsPhysics, actually correct a
 potentiatlly nasty bug
* Replace echo by printf in all the script of NPL to avoid issue with
* unrecognize -e option on various linux platform
* Rebase Tiara to take latest change in NPL script