Add support for prefetching fields This makes it possible to specify the fields that should be prefetched as part of a getForFields query. Doing a prefetch on a ReferenceProperty when it is known that the property will be referenced in (almost all) entities is far more efficient than doing the invididual fetches sequentially.

#!/usr/bin/env python

if __name__ == "__main__":
    import sys
    name = sys.argv[0]
    args = ' '.join(sys.argv[1:])
    print >> sys.stderr, "%s has been moved into django-admin.py" % name
    print >> sys.stderr, 'Please run "django-admin.py compilemessages %s" instead.'% args
    print >> sys.stderr
    sys.exit(1)