Add IronSoftware.Abstractions directive

Author: jordi-ironsoftware

IronSoftware.Drawing/IronSoftware.Drawing.Common/AnyBitmap.cs

@@ -21,12 +21,13 @@
 using System.Linq;
 using System.Net;
 using System.Net.Http;
-using System.Reflection;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
 
+using IronSoftware.Abstractions;
+
 namespace IronSoftware.Drawing
 {
     /// <summary>