BSAL_INPUT_COUNT_PROGRESS should output a 64-bit integer

Link: https://github.com/GeneAssembly/biosal/issues/192
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
input: errpr codes are signed

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

Link: https://github.com/GeneAssembly/biosal/issues/214
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
set kmer length for kernels and aggregator

Link: https://github.com/GeneAssembly/biosal/issues/215
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
send kmers to aggregator

Link: https://github.com/GeneAssembly/biosal/issues/212
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>