Added more information about project installed

Before enhancement:
![capture d ecran 2014-11-30 a 21 05 49](https://cloud.githubusercontent.com/assets/667519/5239116/bf08c954-78d4-11e4-9d46-01767681be37.png)

After enhancement:
![capture d ecran 2014-11-30 a 21 03 16](https://cloud.githubusercontent.com/assets/667519/5239124/c4fbbf88-78d4-11e4-9ef6-4e8a394229ad.png)

For now it's OK to use this method to get the installed version ... but soon, when we improve the way we get the Symfony version to be installed, this code will be unnecessary because we already know the exact version before installing Symfony.