Avoid more buffer overflows due to using snprintf() on fixed size buffers

The sna*/atom computes were not destroying SNA objects. Fixed.

doc page clarifications

New stress/mop and stress/mop/profile computes for USER-MISC 

2 new computes: chunk/spread/atom and reduce/chunk

bond/react: efficient competing reactions

add variable option to compute bond/angle/dihedral local

Rename files for pair style eam/cd/omp in USER-OMP

cmake: fix Eigen3 detection

cmake: fix globbing of emacs files

Avoid buffer overflow during errors with long filenames

Correct multiple issues in manual build

small doc page changes, format and content on doc page tarballs

Bugfix pair morse smooth linear

Avoid unnecessary sorting in print_columns

# Conflicts:
#	cmake/CMakeLists.txt

Expand the list of code owners for more automated review requests

Done by: sed -i '/GLOB/s@/\*\.@/[^.]*.@g' CMakeLists.txt

For some reason FindEigen3.cmake defines all cap. variables, i.e.
Eigen3_FOUND -> EIGEN3_FOUND