Django 1.7rc1 is now out, so let's test it!
Reload image, in case other EXIF data is accessed during save
Store the date taken in the photo object

That way we can query about it, without opening the image
file.

Eventually, we'll store all the EXIF data we care about on
the model, but this is a start.
Support getting the range of dates for an album
Display date ranges on album pages
Add a couple more things to do
Moving the EXIF module to the more generically named image
p is a terrible variable name
Prevent uploading invalid images