engine: fix memory leak

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
remove GeneAssembly master branch because there is not one person associated to it.

Link: https://github.com/GeneAssembly/biosal/issues/171
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add author file

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