Add module rating
Add module rating #43 (fixed bug: rating of logged user was displayed
in other users)
Add module rating #43 (added rating validation)
Add module rating #43 (added update db script)
Add module rating #43 (added usual rating with stars)
Add module rating #43 (added formatting to average rating value and info
about count of users)
Add module rating #43 (fix. show rating only for module's comments)