combine xaml

virtues:
1. 2 or 3 times layout speed
2. smaller dll

src/Shared/HandyControl_Shared/Themes/Lang.xaml

@@ -0,0 +1,7 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:langs="clr-namespace:HandyControl.Properties.Langs">
+
+    <langs:LangProvider x:Key="Langs"/>
+
+</ResourceDictionary>