General
 - general C#-ification

DemoMain
 - syntax highlighting

DemoStockBrowser
 - underline _label properly
 - use StudlyCaps instead of current horrible hack
 - missing stockitems for some reason
 - remove duplication in ListStore, and use DataFunc's

DemoHyperText
 - link tags are recreated too much and never removed

Future
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IconView - gtk 2.6
RotatedText - pango 1.6