For bitbucket issue #2, tweak the admin settings for the Post model to reduce slow queries. Define our own queryset() method so we can control the select_related(), and not have it cascade from post to topics to forums to categories. Removed 'topic' from list_display because MySQL still sucked with 2 inner joins. Now it seems to be tolerable with only one join to User.

"""
pick_potd is a custom manage.py command for the POTD application.
Calling it will pick a new POTD.

"""
from django.core.management.base import NoArgsCommand

from potd.tools import pick_potd


class Command(NoArgsCommand):
    help = "Chooses the next POTD."

    def handle_noargs(self, **options):
        pick_potd()