Added redirect and test for it (pending)
Wrote some tests for
Made log index and history agnostic to the type of object whose history is being displayed
Added paper_trail to EquipmentModel and EquipmentObject models
The assumption that object ID is a Reservation ID no longer holds -> display made agnostic (and, for now, less interactive)
Further changes to agnosticize the display to object type
Restricted controller view to admins only
Added link to top-level navigation
Fixed assumption that model is always present (if it is deleted, view rendering fails hard)