Fixes signature of driver's "wait" method (rename $time to $timeout)
Merge pull request #39 from aik099/driver-wait-signature-fix

Fixes signature of driver's "wait" method (rename $time to $timeout)
Simplified the Travis configuration

This avoids testing all Symfony DomCrawler versions against each PHP versions to limit the number of jobs in the build matrix.
PHP 5.6 has also been added to the matrix.