predict bucket count if on one node

time ./scripts/development/run-argonnite-1-28.sh |tee log
15m18.219s
71deaa88265222cd8c27c88980eb5c4f29c966af  coverage_distribution.txt-canonical

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

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
write coverage distribution to a directory with -o option

Link: https://github.com/GeneAssembly/biosal/issues/430
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
put an upper bound on the sequence store production size

Link: https://github.com/GeneAssembly/biosal/issues/438
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>