hygiene, make rbm(1) an installed binary

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
hygiene, add file headers and footers to rbm.c

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'code/hygiene'

* code/hygiene:
  hygiene, add file headers and footers to rbm.c
  hygiene, make rbm(1) an installed binary
minor, provide quick'n'dirty rand-test for the dr_rand_poiss() routine

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'test/rand'

* test/rand:
  minor, provide quick'n'dirty rand-test for the dr_rand_poiss() routine