only show the first 30 lines when counting lines

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
remove print statement from the library

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
call detect in input

Link: https://github.com/GeneAssembly/biosal/issues/60
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>