Deleted unused migrations
deleted old session add controller.
Added treatment addition post handling.
Renamed race_ethnicity_id column to ethnicity_id.
Added Eloquent namespace path.
Added route filters for the Add Session form.
Deleted the treatment tags field from the add treatment form.
Added CSS for calendars embedded into forms.
Created "Add Session" controller.
Created treatment_session migration.
Created Treatment model.
Created treatment session model.
Created "Add Session" blade template.