* Port the Kate Snippets plugin to the new interfaces.
* Factor out the snippet widget into its widget class.
* Make it look less like MFC and more like Qt (and like other Kate plugins, too).

I guess feature freeze is in hard effect, no?

Anyways, it's safe to commit since the plugin isn't built anyways at the moment.

Replacement of Q3ListView and Q3TextEdit pending, as well as a *slightly* more usable user interface.