Upgrade to Selenium 2.32.0

WebDriver:
  This release supports Firefox verions: 10esr, 17esr, 19, 20

  * Let WindowsUtils.killPID() kill the whole process tree
  * Implementing support for implicit "submit" button type in HtmlUnitDriver.
  * bug fix for python hang with 302 response
  * Adding better support for SVG within Firefox. Has better scrolling to element and allows JavaScript execution
  * Fixing case of "no active element" for HtmlUnitDriver
  * WindowsUtils.kill() fix on Windows 8
  * Updating HtmlUnit to 2.12 (and cssparser to 0.9.9)
  * Fixing illegal negative timeout values for HtmlUnitDriver, zero means infinite wait
  * Implementing pageLoadTimeout in HtmlUnitDriver
  * Allow users to specify a custom location for Safari's data directory using the "safari.dataDir" capability.
  * Fix for using DesiredCapabilities with WebDriverBackedSelenium
  * PhantomJS Driver bindings updated to 1.0.3
  * Minimize the number of third party libraries used by the very heart of the remote webdriver server.
  * fix issue where server was appending '?null' to all forwarded requests
  * Issues fixed: 5293, 4902, 5283, 5278