Revert changes pushed by mistake

Revert "Remove try/except that can hide programming errors"

This reverts commit 2ce01ae40c7296a2456a6a92ea1a19977a20f754.

Revert "Output queues in results"

This reverts commit 7dc0cc7806de7d340d2c4518b980779ddbdc92cc.

Revert "Raise an error when attempting to use an invalid scheduling rule on a queue"

This reverts commit 7bca22bfcce0bc8dadb845418ce13be6dbc18659.

Revert "display gantt by job & by station"

This reverts commit 1094e8812add245b622b0b6f91864f60a06e602b.