Minor on white paths support

Just a minor release on white paths management

thanks to @obernado and @armellin

Support for Symfony3

The branch 0.2.* is suitable only for Symfony >= 2.6.

We have fixed the wrong resource path location in new symfony versions and we migrate the dialog helper to the question helper available only for Symfony >= 2.6

Fixes wrong support list Symfony >= 2.4

Fixes #4 - Actually this plugin support Symfony >= 2.4

Allows different Symfony2 Versions

Fixes #3 - Allows different symfony2 versions