Genshin/gaku — pull request #252 by tapalilov (2013-11-18 14:15:40+00:00)
Title: Grading method hstore

Please dont merge until push tests
![screenshot from 2013-11-18 16 11 44](https://f.cloud.github.com/assets/940649/1563213/dbe79e30-505b-11e3-8505-12224e7da08f.png)