Merge branch 'master' into ScaFaCoS

.gitignore

cmake/CMakeLists.txt

cmake/FindLAMMPS.cmake.in

cmake/Modules/FindZMQ.cmake

cmake/Modules/StyleHeaderUtils.cmake

cmake/pkgconfig/liblammps.pc.in

doc/Makefile

doc/lammps.1

doc/src/Build_basics.txt

doc/src/Build_cmake.txt

doc/src/Build_extras.txt

doc/src/Build_make.txt

doc/src/Build_package.txt

doc/src/Build_settings.txt

doc/src/Build_windows.txt

doc/src/Commands_all.txt

doc/src/Commands_bond.txt

doc/src/Commands_pair.txt

doc/src/Commands_parse.txt

doc/src/Eqs/pair_atm.jpg