New WebKit examples; new version 14.4.1

[polos]

I have added some WebKit examples:

- dom.lisp (display DOM tree)
- strip-html (search/remove/iterate web elements)
- plugin-widget (embed custom QWidget in QWebView)
- webkit-bridge (call Lisp functions from JavaScript)

QWebInspector features script debugging and a console, so it integrates very conveniently with some example (e.g. in "webkit-bridge", you can call your Lisp functions directly from the JavaScript console).

The new version 14.4.1 contains QWebPluginFactory, which is needed by the "plugin-widget" example.

Enjoy,

Paul