Merge pull request #1021 from akohlmey/spin-package-fixes

.github/CODEOWNERS

doc/src/Eqs/pair_spin_dmi_forces.jpg

doc/src/Eqs/pair_spin_dmi_forces.tex

doc/src/Eqs/pair_spin_dmi_interaction.jpg

doc/src/Eqs/pair_spin_dmi_interaction.tex

doc/src/Eqs/pair_spin_exchange_forces.jpg

doc/src/Eqs/pair_spin_exchange_forces.tex

doc/src/Eqs/pair_spin_exchange_interaction.jpg

doc/src/Eqs/pair_spin_exchange_interaction.tex

doc/src/pair_spin_dmi.txt

doc/src/pair_spin_exchange.txt

examples/SPIN/bfo/in.spin.bfo

examples/SPIN/cobalt_hcp/in.spin.cobalt_hcp

src/SPIN/atom_vec_spin.cpp

src/SPIN/compute_spin.cpp

src/SPIN/pair_spin_dmi.cpp

src/SPIN/pair_spin_dmi.h

src/SPIN/pair_spin_exchange.cpp

src/SPIN/pair_spin_magelec.cpp

src/SPIN/pair_spin_neel.cpp