rbdemo had a couple issues on a production server. First of all, the

package didn't contain the management commands, and depended on

ReviewBoard (which can cause problems).
Second, resetting the demo server ended up putting things in a bad

state. We didn't have the right permissions and ownership for media

files.
This change fixes these problems. There may be more issues that I'm

still investigating.

Tested a deploy with these locally, and saw the correct permissions and

the management command.