Need to default user settings on account creation

[durden]

Looks like we don't default the user settings when a user creates their account. Do the following to see the error:

1. Login with new user
2. Create a post
3. Try to view the post (/username/post_title)

You should see an error similar to this:

TemplateSyntaxError at /durden/test/ Caught DoesNotExist while rendering: Setting matching query does not exist.

The error is on this line:

{{ post.create_dt|localize:user }}

in the following file: apps/codrspace/templates/_post_content.html