Added NuGet readme file to the Jdenticon-net package.

Targets/Jdenticon.Package/Jdenticon.Package.csproj

@@ -48,6 +48,7 @@
     <None Include="Web.config.Mvc.transform" />
   </ItemGroup>
   <ItemGroup>
+    <Content Include="ReadMe.Core.txt" />
     <Content Include="ReadMe.WebApi.txt" />
     <Content Include="ReadMe.WebForms.txt" />
     <Content Include="ReadMe.Mvc.txt" />

Targets/Jdenticon.Package/ReadMe.Core.txt

@@ -0,0 +1,32 @@
+***************************************************************
+* JDENTICON-NET
+***************************************************************
+
+Use the Identicon class to generate an identicon:
+
+	using Jdenticon;
+	// ...
+	Identicon
+		.FromValue("string to hash", size: 160)
+		.SaveAsPng("test.png");
+
+The save operations are implemented as extension methods so remember
+to include a using for the Jdenticon namespace.
+
+Also consider the following NuGet packages if they are relevant for
+your application:
+
+  * Jdenticon.AspNet.Mvc
+
+  * Jdenticon.AspNet.WebApi
+
+  * Jdenticon.AspNet.WebForms
+
+  * Jdenticon.Gdi
+    If you want to render icons in a WinForms application.
+
+  * Jdenticon.Wpf
+
+Full documentation is available at
+https://dmester.github.io/jdenticon-net-docs/html/N_Jdenticon.htm
+

Targets/Jdenticon.Package/jdenticon-net.nuspec

@@ -37,5 +37,6 @@
     <file src="..\..\releases\help\Jdenticon.xml" target="lib\net45\Jdenticon.xml" />
     <file src="..\..\releases\help\Jdenticon.xml" target="lib\netstandard1.0\Jdenticon.xml" />
     <file src="..\..\releases\help\Jdenticon.xml" target="lib\netstandard1.3\Jdenticon.xml" />
+    <file src="ReadMe.Core.txt" target="readme.txt" />
   </files>
 </package>