Add utils module, get some code out of the views
Switch to django-appconf for settings
Basis for including badge image on claim page

Right now, just uses a default image.  Soon, will allow real images as
specified in the badge itself.
Flesh out finder for badge assertion images
Switch to django-nose for running tests
Nose captures logs during testing, so these are less annoying now
Fix bytes/text error in claim page
Work around django-nose not liking django 1.7
Really get the image from an assertion
elaborate slightly on doc for assertion image