Added Konqueror 4.13 to ES5, plus minor changes

In addition to adding KQ:
* Removed the "For example" footnotes (on the basis that the example test code contained the example, too).
* Removed the define-property-webkit note from WebKit (but not from Safari 5).
* Renamed the Opera and Chrome rows to reflect the fact of Opera 15+ being Chromium-based rather than Opera 12-based.
* Added ES7 hyperlinks to the ES5 and ES6 pages.
* Set "Show obsolete browsers" off by default. The obsolete browsers are all multiple years old now - their relevance has diminished.