rename event counter to counter

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add message tags to get actor node name and worker count

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add special name for actor names

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add a message function to get all information

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
print counters as 64-bit integers

Link: https://github.com/GeneAssembly/biosal/issues/154
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add inbound and outbound bytes to actor and node counters

Link: https://github.com/GeneAssembly/biosal/issues/153
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>