don't print probabilities for work stealing

Link: https://github.com/GeneAssembly/biosal/issues/624
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
don't steal from self

Link: https://github.com/GeneAssembly/biosal/issues/623
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add API call to use a random spawner

Link: https://github.com/GeneAssembly/biosal/issues/622
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add -transport option to change the transport layer

Link: https://github.com/GeneAssembly/biosal/issues/592
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>