added migration to add vote score and views fields to photos

![1247140069_baby_does_a_spectacular_fall](https://f.cloud.github.com/assets/4403991/1597237/df862e5a-530b-11e3-8947-3880f8d0d961.gif)
![1240308743_soccer-wtf](https://f.cloud.github.com/assets/4403991/1597244/e1c40db8-530b-11e3-96dd-cbbd536726b4.gif)