Added some docs.

src/SlatedGameToolkit.Framework/Logging/ILogListener.cs

@@ -4,6 +4,10 @@ namespace SlatedGameToolkit.Framework.Logging
 {
     public interface ILogListener
     {
+        /// <summary>
+        /// The severity of the messages this log should receive.
+        /// </summary>
+        /// <value>The severity of the logs.</value>
         LogLevel Level { get; }
 
         /// <summary>