Updated DataGrid (markdown)

DataGrid.md

@@ -1,6 +1,7 @@
 # DataGrid
+_Only available in the Plus Edition_
 
-The datagrid included in Extended WPF Toolkit provides a stunning, shaded appearance and capabilities such as inertial smooth scrolling and animated full-column reordering—which mimics the physics of real-life movement. Add to that the datagrid’s zero-lag data virtualization, and you have the fastest WPF datagrid around—in performance and feel. It also easily handles millions of rows and thousands of columns, and integrates quickly into any WPF app.
+The datagrid included in the Plus Edition provides a stunning, shaded appearance and capabilities such as inertial smooth scrolling and animated full-column reordering—which mimics the physics of real-life movement. Add to that the datagrid’s zero-lag data virtualization, and you have the fastest WPF datagrid around—in performance and feel. It also easily handles millions of rows and thousands of columns, and integrates quickly into any WPF app.
 
 This datagrid was the first datagrid for WPF. It was released in 2007 and has been consistently updated since then. There have been 75 major and minor updates as of January 2018. It is used in many major business applications, and is also used by portions of Visual Studio.