Merge pull request #2 from prasannavl/patch-1

Fix the co-ords on Windows according to WinAPI. 
diff --git a/ts_windows.go b/ts_windows.go
index 0dc4586..2f34d56 100644
--- a/ts_windows.go
+++ b/ts_windows.go
@@ -55,8 +55,8 @@
 		return ws, err
 	}
 
-	ws = Size{info.SrWindow.Right,
-		info.SrWindow.Bottom,
+	ws = Size{info.SrWindow.Bottom,
+		info.SrWindow.Right,
 		info.DwCursorPosition.X,
 		info.DwCursorPosition.Y}