[Symfony2] Updated gitignore to prepare for Symfony2 installation
[Symfony2] Installed Symfony2
[Symfony2] Legacy application is launched if the route is not found in Symfony2
[Symfony2] Used Symfony2 parameters in the legacy application
[Symfony2] Used Symfony2 parameters in the legacy application

The `web/config/parameters.php` file now uses the values found
in the `app/config/parameters.yml` file.
With this, there's only one place to put the configuration.

Also the 'Project configuration' section in the README has been
removed. A next commit will make the creation and filling of
the `app/config/parameters.yml` automatic at the installation
of the project.
[Symfony2] Added Incenteev\ParameterHandler
[Symfony2] Added an installation script
[Symfony2] Fixed composer package name, license and description
[Symfony2] Updated dependencies
[Symfony2] Added the symlink option for assetic at intallation
[Symfony2] Added LESS, UglifyJs and UglifyCss for assets management
[Symfony2] Fixed CS: removed horizontal alignments
[Symfony2] Added Swiftmailer
Merge branch 'feature/symfony2' into develop