disable bucket count estimation feature

For test on 6144 cores, actual full bucket count was
around 11989529 for each kmer store.
But the predicted counts were way too high:
1899 16777216
3989 33554432

Link: https://github.com/GeneAssembly/biosal/issues/414
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add libcppa in documentation

Link: https://github.com/GeneAssembly/biosal/issues/412
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add timer for file counting

Link: https://github.com/GeneAssembly/biosal/issues/411
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add SCALE message tag

Link: https://github.com/GeneAssembly/biosal/issues/409
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>