793bfed372
So if we don't have information regarding gender, age or geozone, stats regarding those topics will not be shown. Note we're using `spec/models/statisticable_spec.rb` because having the same file in `spec/models/concerns` caused the tests to be executed twice. Also note the implementation behind the `gender?`, `age?` and `geozone?` methods is a bit primitive. We might need to make it more robust in the future.