Upgrade to Selenium2 2.19.0

v2.19.0
=======

WebDriver: 
  * Server-side implementation of the webdriver-backed selenium.
  * "sendKeys" works in the webdriver-backed selenium when using
    safari.
  * Implement local/session storage for iOS driver.
  * Exceptions now thrown when an alert occurs during script
    execution.
  * Native events implemented for Firefox 10.
  * Renamed the experimental "fast" page loaded strategy "unstable"
    and disable queuing of commands when it's enabled.
  * Corrections to javadocs.
  * Disabled native events for Firefox 8 as it's deprecated by
    Mozilla.

RC:
  * Update cybervillains certificate (thanks to Ivan De Marino and
    Mark Watson @ Neustar)
  * Default to using the native xpath engine in selenium-backed
    webdriver instances.
  * Correctly fire events when outside a firefox extension

WebDriverJS:
  * Return a promise from webdriver.WebDriver.prototype.quit() so
    users may register callbacks.
  * Small tweaks so WebDriverJs works as expected in IE7/8.

Known Issues:
  * Holding down a modifier key and clicking with Firefox 10 on
    Windows does not work reliably when using native events.


v2.18.0
========

WebDriver:
  * FIXED: 3169: Getting value attribute on option elements.
  * Alert handling in Firefox and IE: Throwing UnhandledAlertException
    if an alert is present during an operation. The unhandled alert is
    also dismissed to mitigate repeat exceptions.
  * Better handling of getText invocations on SVG elements.
  * FIXED: 3253: Clicking stopped working on Firefox 4.
  * Android Driver now supports Flash, Geolocation.
  * FIXED: 1371: iPhone Driver now supports frame switching.

RC:
  * FIXED: 2958: Selenium RC now closes IE HTA when the tests finish.

WebDriverJs:
  * Fixes around findElements.