Added an override of the osfamily fact for CernVM.
Removed extraneous comments at the end of the class parameter list, for compatibility with older puppets.
Added an empty parameter list.
Removed dependence on cvmfs::client in grid_setup.pp. Added use_cvmfs
conditional in init.pp to accomodate for CernVM. Added a conditional not to
install packages under CernVM.
Changed location of job wrapper script for CernVM.