Tested running specific tests after reading:
http://mrhaki.blogspot.co.uk/2013/05/gradle-goodness-running-single-test.html

gradlew clean chromeTest -DchromeTest.single=Smoke*
Can be used to run only the tests starting with Smoke, added the test logging for command line verification.
Added the functional sourceSet and moved all the tests into it.
Updated to selenium 2.42.0
Added and tested IeDriver (with IE 10)
Cross browser smoke tests: gradlew clean functionalTest -DchromeTest.single=Smoke* -DieTest.single=Smoke*