Added missing file headers.

And sorted usings.

src/Markup/Perspex.Markup.Xaml/Converters/PointsListTypeConverter.cs

@@ -1,7 +1,10 @@
-using OmniXaml.TypeConversion;
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
 using System;
 using System.Collections.Generic;
 using System.Globalization;
+using OmniXaml.TypeConversion;
 
 namespace Perspex.Markup.Xaml.Converters
 {

src/Perspex.Controls/Shapes/Line.cs

@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;

src/Perspex.Controls/Shapes/Polygon.cs

@@ -1,9 +1,12 @@
-using Perspex.Media;
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Perspex.Media;
 
 namespace Perspex.Controls.Shapes
 {

src/Perspex.Controls/Shapes/Polyline.cs

@@ -1,9 +1,12 @@
-using Perspex.Media;
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Perspex.Media;
 
 namespace Perspex.Controls.Shapes
 {

src/Perspex.SceneGraph/Media/PolylineGeometry.cs

@@ -1,9 +1,12 @@
-using Perspex.Platform;
+// Copyright (c) The Perspex Project. All rights reserved.
+// Licensed under the MIT license. See licence.md file in the project root for full license information.
+
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using Perspex.Platform;
 
 namespace Perspex.Media
 {