Utilize select_related() for user & user profiles. This commit also removes the caching of the avatar URL in the avatar template tag. This is because we are now using select_related, so we already have the profile & avatar when we get to the tag. Thus we don't need to waste time querying the cache. Removed an apparently unused member map template as well.

[
    {
        "pk": 1, 
        "model": "oembed.provider", 
        "fields": {
            "api_endpoint": "http://www.youtube.com/oembed", 
            "name": "YouTube", 
            "url_regex": "^http://www\\.youtube\\.com/watch\\?v=\\S+$", 
            "format": 0
        }
    }
]