performance: add tool to measure all-to-all performance

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
transport: remove trailing whitespace

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
performance: measure overhead of sending small messages

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
thorium: schedule actor when moving messages to mailbox

Link: https://github.com/GeneAssembly/biosal/issues/779
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
thorium: turn on binomial tree code path

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>