add hopper
Revert "threads should not be daemons..."

This reverts commit 7ff950bb1afc1ecd8ebdbf508bfcad752ccc2b30.
Re-fix blacklight config. Addresses #359 (again).
Merge branch 'devel' into feature/shutdown
hopper usues torque (thanks Mark!)
as fallback, use PPN information provided by SAGA