With inexlib/ourex/geant4<version>

Have inexlib/ourex/geant4.10.03.p01 : clearly users have problems to build by using a "sys geant4" (a pre installed geant4). Then we restore a more straightforward build by embarquing geant4 in the source packing. Moreover our "build distrib" is not ready for a "sys geant4" having not the archive libs (then having only shared libs), and asking people to install geant4 with archive (having the cmake "-DBUILD_STATIC_LIBS=ON") complicate their life.

Moreover this default build permits to build for Windows-10.