High Priority:
* libG4tools dependencies
* libG4ToolsSG dependencies
* libG4visVtk dependencies
* Review internal dependencies for -dev packages
* Review g4tools files for copyright (e.g. gl2ps)

Normal Priority:
* Use system CLHEP (GEANT4_USE_SYSTEM_CLHEP)
  * Wait for 2.4.5.1 (currently in NEW)
  * Fix missing dev files in libclhep-dev
  * Remove source/externals/clhep from tarball
* Use system GL2PS
  * Write patch:
    * Create G4gl2ps module, move to source/externals
    * Add FindGL2PS.cmake (e.g. from VTK)
  * Propose to GL2PS upstream to add PkgConfig files

Low Priority:
* Build the doxygen documentation
