Ajout de graphiques

![capture du 2014-02-01 23 13 42](https://f.cloud.github.com/assets/320372/2058946/4f5ced3a-8b8e-11e3-9265-5ef5a45eff4a.png)
![capture du 2014-02-01 23 13 57](https://f.cloud.github.com/assets/320372/2058947/4f6282ae-8b8e-11e3-9c62-038378b07093.png)
![capture du 2014-02-01 23 14 09](https://f.cloud.github.com/assets/320372/2058948/4f6bc22e-8b8e-11e3-805d-0db13973ae17.png)