gromacs patch 2018.4 -> 2018.5

patches/gromacs-2018.5.diff/src/gromacs/CMakeLists.txt

.../gromacs-2018.5.diff/src/gromacs/CMakeLists.txt.preplumed

patches/gromacs-2018.5.diff/src/gromacs/mdlib/force.cpp

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patches/gromacs-2018.5.diff/src/gromacs/mdlib/minimize.cpp

...macs-2018.5.diff/src/gromacs/mdlib/minimize.cpp.preplumed

patches/gromacs-2018.5.diff/src/programs/mdrun/md.cpp

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patches/gromacs-2018.5.diff/src/programs/mdrun/mdrun.cpp

...romacs-2018.5.diff/src/programs/mdrun/mdrun.cpp.preplumed

patches/gromacs-2018.5.diff/src/programs/mdrun/repl_ex.cpp

...macs-2018.5.diff/src/programs/mdrun/repl_ex.cpp.preplumed

patches/gromacs-2018.5.diff/src/programs/mdrun/repl_ex.h

...romacs-2018.5.diff/src/programs/mdrun/repl_ex.h.preplumed

patches/gromacs-2018.5.diff/src/programs/mdrun/runner.cpp

...omacs-2018.5.diff/src/programs/mdrun/runner.cpp.preplumed

patches/gromacs-2018.5.diff/src/programs/mdrun/runner.h

...gromacs-2018.5.diff/src/programs/mdrun/runner.h.preplumed