The default driver is now the ChromeDriver (previously: HtmlUnitDriver). This is due to incompatibilities with Java 1.7 (see http://stackoverflow.com/questions/7615645/ssl-handshake-alert-unrecognized-name-error-since-upgrade-to-java-1-7-0/11043871#11043871) and a bad ECMA script implementation.
Merge branch 'master' of https://github.com/codecentric/ccunit