Update README.markdown

Author: hallem

README.markdown

@@ -8,6 +8,7 @@
 
 * Supports .NET 3.5+, Silverlight 4, Windows Phone 7, Mono, MonoTouch, Mono for Android, Compact Framework 3.5
 * Easy installation using [NuGet](http://nuget.org/packages/RestSharp) for most .NET flavors
+* Supports strong naming using [NuGet](http://nuget.org/packages/RestSharpSigned) for most .NET flavors
 * Automatic XML and JSON deserialization
 * Supports custom serialization and deserialization via ISerializer and IDeserializer
 * Fuzzy element name matching ('product_id' in XML/JSON will match C# property named 'ProductId')