TheBB/aligulac — pull request #77 by Prillan (2013-07-19 17:59:43+00:00)
Title: Implement issue 76.

A small tooltip (HTML "title" attribute) shows the change from previous period in the ratinglist.

![tooltip](https://f.cloud.github.com/assets/1675190/827458/dd6dbbfa-f09c-11e2-9b6b-d3ae610be012.jpg)