Move GeometryUtilities

src/ImageSharp/GeometryUtilities.cs

@@ -1,10 +1,10 @@
-// Copyright (c) Six Labors and contributors.
+// Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
 using System;
 using System.Runtime.CompilerServices;
 
-namespace SixLabors
+namespace SixLabors.ImageSharp
 {
     /// <summary>
     /// Utility class for common geometric functions.