moved xaml and source of ExtendedTabControl into seperate folder

MultiTerm.Wpf.CustomControl/ExtendedTabControl/ExtendedTabControl.xaml

@@ -1,7 +1,6 @@
-<ResourceDictionary
-    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-    xmlns:local="clr-namespace:MultiTerm.Wpf.CustomControl">
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:local="clr-namespace:MultiTerm.Wpf.CustomControl">
     
     <SolidColorBrush x:Key="TabItem.Selected.Background" Color="#FFFFFF"/>
     <SolidColorBrush x:Key="TabItem.Selected.Border" Color="#ACACAC"/>