move the dev build command in the Makefile

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add pthreads in readme

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
implement consumer-producer structure

Link: https://github.com/GeneAssembly/biosal/issues/19
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>