Added copyright header to some new files.

src/Markup/Perspex.Markup/Data/CommonPropertyNames.cs

@@ -1,8 +1,5 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+// 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.
 
 namespace Perspex.Markup.Data
 {

tests/Perspex.Markup.UnitTests/Data/InpcPluginTests.cs

@@ -1,12 +1,11 @@
-using Perspex.Markup.Data.Plugins;
+// 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 Perspex.Markup.Data.Plugins;
 using System;
 using System.Collections;
-using System.Collections.Generic;
 using System.ComponentModel;
-using System.Linq;
 using System.Runtime.CompilerServices;
-using System.Text;
-using System.Threading.Tasks;
 using Xunit;
 
 namespace Perspex.Markup.UnitTests.Data