Added pair styles lj/expand/coul/long to USER-MISC and its gpu version to GPU package, added lj/cut/dipole/long/gpu; and added an example Makfile to build GPU package for multi-arch

this will trim warnings and error messages when compiling using the CMake
build system, which uses full paths. as a bonus,one can now see, if a
source is taken from a package or not.

- in fix rigid, rigid/small, and poems, a string argument was
  incorrectly assigned to a %d format
- plug two small memory leaks in fix bond/react

the qeq/fire style depends on pair style comb,
thus QEQ needs and explicit Install.sh file and
it has to depend on MANYBODY

Also, cleaned up UCG_MASK and UCGNEW_MASK usage in atom_vec_dpd_kokkos.cpp
Fixes a crash when using the python interface on a 2nd LAMMPS invocation
when using the restart (or replicate) commands, because of garbage
in the uCG and uCGnew arrays leftover from the previous LAMMPS invocation.

this introduces an optional keyword, so backward compatibility is preserved.
this closes #884

provide keyword/value option to compute ackland/atom for selecting legacy or current variant of implementation