change the block size in bytes for production

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
put an upper bound on the number of graph stores

Link: https://github.com/GeneAssembly/biosal/issues/634
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
don't show thorium messages without -print-load

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