Task:Karma for applications

This task is to define a karma system for applications as a basis for judging their "quality".

Goals

 * Provide a simple, unified way for users and developers to judge an application's quality.
 * Provide a distributed quality assurance system for handling package promotion.

Metrics for judging "quality"
In no particular order.


 * Number of downloads.
 * Number of ratings.
 * Level of ratings.
 * Actively maintained.
 * Frequency of updates.
 * Bug activity (assuming a tracker on bugzilla).
 * Number of releases available for.