Commit before meeting 032218

doc/src/fix_integration_spin.txt

doc/src/fix_langevin_spin.txt

doc/src/pair_spin_exchange.txt

doc/src/pair_spin_me.txt

doc/src/pair_spin_soc_dmi.txt

doc/src/pair_spin_soc_neel.txt

examples/SPIN/bfo/in.spin.bfo

examples/SPIN/cobalt_fcc/in.spin.cobalt_fcc

examples/SPIN/cobalt_hcp/in.spin.cobalt_hcp

examples/SPIN/iron/in.spin.iron

examples/SPIN/nickel/in.spin.nickel

examples/SPIN/read_restart/in.spin.read_data

examples/SPIN/read_restart/in.spin.restart