rename p2p to pt2pt

Link: https://github.com/GeneAssembly/biosal/issues/616
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
fix binomial-tree algorithm

Link: https://github.com/GeneAssembly/biosal/issues/145
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
use a module for proxy message

Link: https://github.com/GeneAssembly/biosal/issues/618
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
move action helpers in modules

Link: https://github.com/GeneAssembly/biosal/issues/617
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
rename actions to action_helpers

Link: https://github.com/GeneAssembly/biosal/issues/617
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
move actor helpers in modules

Link: https://github.com/GeneAssembly/biosal/issues/617
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>