Show active matches on project page

It closes #228.

The specs are failing because I used a scope that is been implemented on #245. At this time that PR is open, when it's been merged, I will rebase this PR.

 A look how the screen looks like:
![screen shot 2014-05-08 at 10 29 49 am](https://cloud.githubusercontent.com/assets/230476/2916541/5af0f672-d6bc-11e3-95fb-30f477374249.png)