more changes from Steve

doc/src/Section_packages.txt

doc/src/fix_scafacos.txt

doc/src/kspace_modify.txt

doc/src/kspace_style.txt

examples/USER/scafacos/README

examples/USER/scafacos/data.NaCl

examples/USER/scafacos/in.scafacos

lib/scafacos/Install.py

src/USER-SCAFACOS/README

src/USER-SCAFACOS/fix_scafacos.cpp

src/USER-SCAFACOS/fix_scafacos.h

src/USER-SCAFACOS/scafacos.cpp

src/USER-SCAFACOS/scafacos.h

src/kspace.cpp

src/kspace.h