Add way to update credit card used in auto-renewals

Add ability to reveal previously generated schedules

Validation errors in caseload editor should be easier to understand

Add the concept of a "category" to each student, and separate groups based on categories

Enable modifying a caseload, but keeping most of its resultant schedule the same

Allow more than 3 buildings

Simplify caseload entry when multiple students have same class periods

Simplify caseload entry when multiple students have same availability restrictions

Show exactly what parts of a generated schedule don't respect the "Prefer" and "Prefer Not" availability entries

Add ability to specify a "Prefer Not" availability entry for the therapist