in bin/build_test.sh, test for TRAVIS env var but retain bash strict mode
in bin/build_test.sh, test for TRAVIS env var but retain bash strict mode

jimallman/dryad-repo,ojacobson/dryad-repo,jimallman/dryad-repo,rnathanday/dryad-repo,ojacobson/dryad-repo,rnathanday/dryad-repo,jimallman/dryad-repo,rnathanday/dryad-repo,jimallman/dryad-repo,jimallman/dryad-repo,rnathanday/dryad-repo,ojacobson/dryad-repo,rnathanday/dryad-repo,ojacobson/dryad-repo,rnathanday/dryad-repo,jimallman/dryad-repo,ojacobson/dryad-repo,ojacobson/dryad-repo