PSR2 conformance patch

I did just a little patch to make the project compliant with [PSR2 coding standard](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md) from the [PHP Framework Interop Group](http://www.php-fig.org/)

The specs [in french are here](https://github.com/php-fig/fig-standards/blob/master/accepted/fr/PSR-2-coding-style-guide.md)

Maybe I added too many carriage returns on some if/elseif/else statements... Let me know if you don't like. I would make it more compact if necessary.