Don't enforce the use of the gzipped assets

Two reasons:

1. I couldn't get apache configured right to use them. First chrome complained that the script wasn't of mime type "application/javascript", but also I think it was getting double compressed as I have gzip compression turned on in apache
2. I'll be using the service outside of the Silex route handling as well, so this indirectly breaks the dependency on `$app['route']`