Make abstract webDriver field in Driver trait implicit.
Rewritten test for Driver in WebBrowserSpec.scala to dynamically include available driver only.
Added GoogleSearchSpec.scala to examples, which demostrate the uses of Driver trait.
Adjusted scaladoc for Driver in WebBrowser.scala.
Updated selenium version version to 2.35.0.
Adjusted test in DriverSpec.scala and WebBrowserSpec.scala.
Merge branch 'driver' of https://github.com/cheeseng/scalatest
Tweaked Scaladoc slightly for selenium.Driver.