This is implemented for most fields but not all. The reason is that there are
some fields for which this does not make sense because no entry is a valid entry.
The supported fields are:
checkbox
file
latlong
menu
number
picture
radio
text
textarea
url
The unsupported fields are:
date
multimenu
* Added the component and ratingarea fields and implemented it throughout
the rating API as mandatory fields
* Cleanup rating indexes
* Upgrade forum/data/glossary ratings
* Moved the logic in the render_rating method to methods of the rating object.
* Added new callback for checking ratingareas
* Cleaned comments here and there
* Mark the xxx_get_participants methods as deprecated
* Refactor rate_ajax and ratingsuser_can_view_aggregate methods
* Cleaned up rating/index.php to use html_table object and moved inline styles to CSS.
* Added missing properties of the rating object that were being set throughout the rating
API.
