Reminder model added...
Merge branch 'master' into reminders
Reminder basic email added...
Correct namespace in sidekiq initializer...
Added reminder's email delivery
Added remind_at restrictions to reminders...
_Done_ with reminders (Yay)
Merge branch 'reminders'

Conflicts:
	app/models/schedule.rb
	app/views/schedules/_form.html.erb
	db/schema.rb
	test/integration/loans_test.rb