define BSAL_ASSERT

Link: https://github.com/GeneAssembly/biosal/issues/420
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
bsal_actor_helper_get_acquaintances should not call the constructor on vector

Link: https://github.com/GeneAssembly/biosal/issues/418
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
improve the scheduling queue code base

Link: https://github.com/GeneAssembly/biosal/issues/419
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>