Update Laravel4.md

This module breaks acceptance tests in Laravel, and should only be used for functional tests. It wasnt very obvious in the docs, and its caused some confusion based upon various forum and twitter posts.

The reason is this module puts Laravel into the "testing" environment, and during "testing" Laravel does not apply filters to routes. PhPBrowser provides enough functionality for acceptance tests, and you can actually do some workaround to force Laravel into a specific 'codeception' environment for acceptance testing against a SQLite database. I posted a guide on how to do that here: http://stackoverflow.com/q/21975982/1317935