[ANN] Update for SimpleWebKit

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Hi all,
I have committed the latest additions to SimpleWebKit. Major changes
are

* added loading of CSS (sub)resources from <link rel="stylesheet">
* added parsing of CSS (including @media, @import etc.)
* added a CSS Browser view to SWK-Browser (to compare Apple WebKit to
SWK)
* fixed some minor bugs in the XML parser and in the WebResource
loader (which could have lead to problems in non-CSS areas)

Well, since this is (as usual) work in progress, you won't see much
change because there is still one missing link: going through the CSS
tree when rendering HTML tags and applying the attributes.

There is one known bug in the loader: if you @import from a different
URL-scheme, nothing is imported. And, there are some minor syntax
parts missing in the style declarations (e.g. [attr~=value]).

This all will be worked on in the next steps to give a much better
experience (e.g. google.com is now broken without CSS).

Nikolaus