start the code to read sequence files in parallel

Link: https://github.com/GeneAssembly/biosal/issues/44
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
change the buffer type for messages to void *

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add bsal_actor_supervisor to get supervisor

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add the number of received messages for an actor

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add number of sent messages for any actor

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
change node rank to node name

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add a list of offsets for messages

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