some namespace improvements - now there is Cadencii.Utilities.
more Cadencii.Utilities migration.
win32 API is now under Cadencii.Platform.Windows namespace.
introduced Cadencii.Media.Windows namespace.
sanitizing namespaces in Cadencii.Gui.Framework.dll.
introduced Cadencii.Gui.Toolkit to represent (winforms-based) toolkit types in Gui.Framework.