Fixes for srp example

Neighbor fixes

Bugfix in the fix_ipi initialization - prevents multiple open_socket calls

Make fix_qeq_reax_kokkos request its own neighbor list

Make fix_rx request its own neighbor list

Updated the reference for the flow/gauss method

Coord atom orientorder atom enhancements

USER-DPD: fix a typo in the DPD-H example input; update reference output.

Collected small bugfixes

print the last input line, when error->all() is called

Updating Kokkos lib

Updated images of succesful merge.

rather than adjusting the communication cutoff, we just print out the minimum value needed and error out

i suspect, this communication cutoff adjustment was included into the code before it was possible to separately set it via comm_modify. stopping with an error message printing the needed/current value is cleaner, in keeping with other modules in LAMMPS and much less problematic.

Included a flag to prevent multiple open_socket calls if run is included multiple times in the LAMMPS input

fix for bug with compute rdf with pair reax/c. we must not copy a neighbor list, if newton settings are not compatible

an alternate route to address this issue would be to allow an "ANY" setting for neighbor list requests and then query the neighbor list for newton setting instead of the force class.

during setup, checking timestep doesn't seem to be sufficient. comparing bins and stencil point, too.

in addition, relevant pointers were not properly initialized to NULL

avoid not only division by zero, but also computing variance for short runs with insufficient resolution

Merge branch 'bugfix_dividebyzero' of https://github.com/timattox/lammps_USER-DPD into collected-small-bugfixes

fix a CUDA constructor warning

e.g. If neighbor list(s) are never rebuilt, the Neigh time will be zero.

This closes #336

also rename pair_lj_coul_gromacs
so it doesn't conflict with the
one now in kokkos_type.h

This reverts commit 51e52b47.

The class params_lj_coul was copy-pasted
into many different pair styles, and only
one of them had the proper KOKKOS_INLINE_FUNCTION
annotations for CUDA.
created a header file for this class that
most of the pair styles now include.
One pair style did add extra members,
so it keeps a local copy of the class.