disable alignment and 2-bit encoding

scripts/development/run-argonnite-4-7.sh
31m17.446s

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
enable 2-bit encoding

with 2-bit encoding (75% memory usage reduction):
./scripts/development/run-argonnite-4-7.sh
33m46.226s

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
1 process with 28 threads must give same performance than 4 * 7

scripts/development/run-argonnite-1-28.sh
33m51.738s

Link: https://github.com/GeneAssembly/biosal/issues/287
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>