tweak do_arith
reorg names in logic.c, related stuff
reorg names in array.c
reorg names in summary.c
reorg names in seq.c
reorg names in complex.c
more reorg onf names in eval.c
reorg names in attrib.c
reorg names in coerce.c
tweak for merge
Merge branch '14-misc-cleanup' into 15-crossprod
Merge branch '14-names-reorg' into 15-crossprod
get rid of unnecessary global do_
Merge branch '14-names-reorg' into 15-crossprod