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.

'''
This file contains the automatic admin site definitions for the podcast models.
'''

from django.contrib import admin
from podcast.models import Channel
from podcast.models import Item

class ItemAdmin(admin.ModelAdmin):
    readonly_fields = ('update_date', )

admin.site.register(Channel)
admin.site.register(Item, ItemAdmin)