No default ReputationSystem class

[cjhenck]

The distribution app refers to a class ReputationSystem with two static methods, and the URLs will not deploy without it. While there is a sample for a model (which is necessary to store reputation) in outline-reputation, new users (such as myself) will struggle to get up and running if there is not a no-op implementation that at least returns a constant for each method within the distribution project.

Specifically, distribution/serializers.py includes references to ReputationSystem.

[cjhenck]

In addition, it would be hard to see how you'd integrate a django model like the one in outline-reputation for a novice user. Perhaps a simple example would help.