fix memory leak in block

Link: https://github.com/GeneAssembly/biosal/issues/226
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
ignore undesired messages asking to stop

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
aggregator send kmers to customers

Link: https://github.com/GeneAssembly/biosal/issues/213
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
fix bug in sequence partitioner with -O0

Link: https://github.com/GeneAssembly/biosal/issues/228
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>