Starting with Qt 4.4.0, Assistant allows Webkit integration. This transforms
its display component to a fully featured HTML renderer and allows the display
of more sophisticated online help. A good reason to use Webkit integration is
the display of documentation generated with Qt's own doxygen2qthelp tool; it
converts Doxygen comments to files suitable for display in Qt Assistant, and
those look much better using Webkit than in stock Assistant.
cf.
<http://labs.trolltech.com/blogs/2008/06/20/introducing-doxygen2qthelp-create-qch-files-from-doxygen-finally/>,
"Usage", Item 4.
Patch attached below applies to the current qt-assistant-4.4.1.ebuild. It adds
a new USE=webkit and the proper deps and config options.
Reproducible: Always
