make into a more typical control interface, expose content template, selector, orientation etc

Author: ButchersBoy

MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.RatingBar.xaml

@@ -73,6 +73,8 @@
             <Setter.Value>
                 <ControlTemplate TargetType="{x:Type wpf:RatingBar}">
                     <ItemsControl ItemsSource="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=RatingButtons}"
+                                  VerticalAlignment="Top"
+                                  HorizontalAlignment="Left"
                                   Margin="{TemplateBinding Padding}">
                         <ItemsControl.ItemsPanel>
                             <ItemsPanelTemplate>