write dummy contigs with buffered writer

Link: https://github.com/GeneAssembly/biosal/issues/537
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
use buffered writer to write coverage files

Link: https://github.com/GeneAssembly/biosal/issues/541
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add some code that use inflate instead of gzseek

Link: https://github.com/GeneAssembly/biosal/issues/539
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
disable big map test

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