I'm against changing the directory structure. It makes things not clear enough about the namespaces. You can switch to PSR-4 if you want but let's keep the directory structure intact.

@jmgq we want to finish the Symfony installer this week, so I wonder if you have time to do the changes proposed by Fabien. The idea is to switch to PSR-4 but maintaining the same directory structure. If you need some help, you can check out this PR from the Symfony repository which does exactly that.

Thanks for the link, @javiereguiluz. I've changed the directory structure to the original one. I've also merged this commit locally into the latest version of master and tested that it works correctly.

Thank you @jmgq.