add appointment crud
integrate calender view
add events in valendar view.
add time functionality
Add service select box
edit appointment
fix merge issues from sprint-2 to calendar-view
Issue fix for timezone problems.
Fix issue for appointment load in calendar.
Calendar loads on selection of service.
AS-10
Issue fix
Logo and Back-ground image upload
Issue fix
Remove unneeded jquery.min
Fix isuue in availabilities_controller for checking staff_id
Add background color to modal
Issue fix for service#index json.  Issue fix for appointment edit.
Issue fix for appointment duration validation.
Add validation for staff name uniqueness.