Upgrade to Selenium 2.7.0

From http://code.google.com/p/selenium/source/browse/trunk/java/CHANGELOG:

WebDriver

• FIXED: 2487: FirefoxDriver no longer types in the URL bar.
• FIXED: Issues to do with not clicking on elements out of view when using
  native events.
• FIXED: 2456: Double click and get no longer hangs Firefox.
• Improved emulation of Selenium RC when using Opera in the
  WebDriverBackedSelenium.
• FIXED: 2421: Chrome returns doubles instead of ints because it supports
  sub-pixel rendering.

RC

• FIXED: #2413: "Missing space between browser name and custom path in error
  message"
• FIXED: 2390, 2477: Make -h a synonym for -help

Automation Atoms

• Allow bot.dom.getInViewLocation to scroll a specified location into view.