General
 - general C#-ification

DemoMain
 - syntax highlighting

DemoIconFactory
 - I think this is removed > gtk2.4

DemoImages
 - improve the Progressive Image loading and error handling

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
 - finish

DemoEntryCompletion
 - set the model

