* [Xaml] allow the Previewer to provide their own Xaml files for any type
* [Xaml] use a Func instead of an interface, easier to use by reflection. Add tests
* [XamlC] move the InitializeComponent duplication to XamlC task
* [XamlC] generate branching code
* [XamlC] fix the XamlC issue
* [XamlC] make the API public
* [docs] fix docs
* [X] Support Merged RD
* [X] Support RD as xaml roots
* [XamlC] I have no idea how that used to work before
* [C] Remove debugging statements
* fix docs