LTSINSCRIP-138 - Roundtrippable migration for Subject Areas to scope them by library.

Should be roundtrippable as long as there's not deliberate bad data creation between up and down.
LTSINSCRIP-138 - Most of the view stuff done, forms still need to change
LTSINSCRIP-138 - Forms updated for subject areas.
LTSINSCRIP-145 - Starting the process of fixing call numbers
LTSINSCRIP-146, LTSINSCRIP-147 - Migration and model change. Dropped table floors_subject_areas
LTSINSCRIP-148, LTSINSCRIP-149 - Theoretically, call numbers and subject areas are both nested and working. More testing needed.
Cleanup of SQL and comments based on feedback from Bobbi. Thanks Bobbi!
LTSINSCRIP-138 - Minor fix for call number stuff controller, LTSINSCRIP-9 - some flash->flash.now changes