Admins can see specific availabilties with map

https://trello.com/c/9FDzOkVv/8-as-an-admin-i-can-see-my-active-schedule-calendar-confirmed-pickups-for-each-with-maps

![charitymaps](https://cloud.githubusercontent.com/assets/8646429/5149631/cdfb85d4-7198-11e4-9937-b537f65278c0.gif)

Does this handle a nil date OK?