StoreTransaction CSV Export Field Updated

Add the student name
Add the store item name (title)
deleted: don't include this field
item: strip out all but the ID portion
context_type: filter out items with unit_points_reset here
reversible: don't include this field


Please find the new CSV here :
https://drive.google.com/file/d/0B4L5_YAjviTASGxBTVl5bjFOUHM/view?usp=sharing
FacilityUsers have a `get_name` method that should work nicely here. It returns the full name if it exists, otherwise the username