copy netcdf,curl, and hdf5 as MAC seems to be having a problem finding these libraries when running VisIt
updating to handle library version variants
Merge remote-tracking branch 'origin/fix_visit_netcdf_error'
Merge remote-tracking branch 'devel/fix_pip_installed_packages'
Made visit off by default
Enable use of system libxml2 and libxslt
Merge branch '348_default_state_packages' into uvcdat_master
Merge branch 'master' of github.com:UV-CDAT/uvcdat into uvcdat_master