use non-consecutive actor names

Link: https://github.com/GeneAssembly/biosal/issues/126
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
initial actors are passed with BSAL_ACTOR_START

Link: https://github.com/GeneAssembly/biosal/issues/127
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
fix BSAL_ACTOR_SYNCHRONIZED bug

Link: https://github.com/GeneAssembly/biosal/issues/131
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>