Added full example on using Selenium with WebBrowser and HtmlUnitDriver.
Made all remaining examples in atAGlance page to work when copy-and-pasted into REPL.
More concise example for Selenium.
Changed css class 'tight' to 'stTight', and use it for <pre> tag in atAGlance page.
Added more explanation to 'eventually'.
Added hyperlinks to explanation text in atAGlance page.
Tweaked home page of user guide.
Droped orphaned empty strings from exmaples. Tweaked home page of user guide.