Merge pull request #742 from rbberger/fix_python_move

doc/src/Section_commands.txt

doc/src/Section_python.txt

doc/src/fix_python_invoke.txt

doc/src/fix_python_move.txt

doc/src/fixes.txt

doc/src/lammps.book

doc/src/python.txt

examples/python/README.fix_python_move

examples/python/in.fix_python_invoke

examples/python/in.fix_python_move_nve_melt

examples/python/in.fix_python_move_nve_melt_opt

examples/python/py_nve.py

python/lammps.py

src/.gitignore

src/Makefile

src/PYTHON/fix_python_invoke.cpp

src/PYTHON/fix_python_invoke.h

src/PYTHON/fix_python_move.cpp

src/PYTHON/fix_python_move.h

src/PYTHON/pair_python.cpp