headers in T4 and generated .cs

src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.cs

@@ -1,5 +1,10 @@
 // <auto-generated />
 
+// <copyright file="PixelOperations{TPixel}.Generated.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
 namespace ImageSharp.PixelFormats
 {
     using System;

src/ImageSharp/PixelFormats/PixelOperations{TPixel}.Generated.tt

@@ -1,4 +1,10 @@
-<#@ template debug="false" hostspecific="false" language="C#" #>
+<#
+// <copyright file="PixelOperations{TPixel}.Generated.tt" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+#>
+<#@ template debug="false" hostspecific="false" language="C#" #>
 <#@ assembly name="System.Core" #>
 <#@ import namespace="System.Linq" #>
 <#@ import namespace="System.Text" #>
@@ -92,6 +98,11 @@
 #>
 // <auto-generated />
 
+// <copyright file="PixelOperations{TPixel}.Generated.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
 namespace ImageSharp.PixelFormats
 {
     using System;