Updated versions to work on Java 8

Updated versions to be compatible with Java 8. Also works with Java 7. 

Got this to work only for Firefox, Chrome was giving errors about the chromedriver (tried using ./gradlew -Dwebdriver.chrome.driver="/Users/erikp/Downloads/chromedriver" chromeTest), and htmlunit (after adding the dependency) was giving errors about failing assertions:

Caused by: Assertion failed: 

$("li.g")
|
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