App refactor for custom_search for Django 1.7.7. upgrade. This commit prevents a lot of Django warnings by creating our Haystack signal processor as part of the custom_search apps' ready() method.

from django.apps import AppConfig


class PotdConfig(AppConfig):
    name = 'potd'
    verbose_name = 'Photo of the Day'
    label = 'potd'

    def ready(self):
        import potd.receivers