Added strong name info to README.md

Author: jaaufauvre

README.md

@@ -22,7 +22,13 @@
 Zero dependency library for generating a Mastercard API compliant OAuth signature.  
 
 ### Compatibility <a name="compatibility"></a>
-.NET Frameworks implementing [.NET Standard](https://docs.microsoft.com/en-us/dotnet/standard/net-standard) 1.3
+
+#### .NET <a name="net"></a>
+This library requires a .NET Framework implementing [.NET Standard](https://docs.microsoft.com/en-us/dotnet/standard/net-standard) 1.3.
+
+#### Strong Naming <a name="strong-naming"></a>
+Assemblies are strong-named as per [Open-source library guidance > Strong naming](https://docs.microsoft.com/en-us/dotnet/standard/library-guidance/strong-naming).
+The SN key is available here: [`Identity.snk`](https://github.com/Mastercard/oauth1-signer-csharp/blob/master/Identity.snk).
 
 ### References <a name="references"></a>
 * [OAuth 1.0a specification](https://tools.ietf.org/html/rfc5849)