Added option class.

src/Generator.Rewrite/Options.cs

@@ -0,0 +1,23 @@
+using CommandLine;
+
+namespace OpenTK.Rewrite
+{
+    public class Options
+    {
+        [Option('d', "debug", DefaultValue = false,
+            HelpText = "Enable calls to GL.GetError(), wrapped around each native call.")]
+        public bool EnableDebugCalls { get; set; }
+
+        [Option("dllimport", DefaultValue = false,
+            HelpText = "Force native calls to use DllImport instead of GetProcAddress.")]
+        public bool UseDLLImport { get; set; }
+
+        [Option('i', "assembly", Required = true,
+            HelpText = "The path to the target assembly that should be rewritten.")]
+        public string TargetAssembly { get; set; }
+
+        [Option('k', "signing-key",
+            HelpText = "The path to the strong name key which should be used to sign or resign the assembly.")]
+        public string StrongNameKey { get; set; }
+    }
+}