support for legacy locations of app media (in APP/media/)

custom_settings.py

# Add this to your settings.py

STATICFILES_FINDERS += (
    'mysite.finders.AppMediaFinder'
)

finders.py

##########################################################################################
#
#   OMFG -- DON'T SHIP THIS WITH YOUR REUSABLE APP, SINCE IT WON'T BE REUSABLE ANYMORE.
#
##########################################################################################

from django.contrib.staticfiles.finders import AppDirectoriesFinder
from django.contrib.staticfiles.storage import AppStaticStorage

class LegacyAppStaticStorage(AppStaticStorage):
    source_dir = 'media'

class AppMediaFinder(AppDirectoriesFinder):
    storage_class = LegacyAppStaticStorage