Added reference project

ref/Events/LogMessageEventArgs.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace Discord
+{
+    public class LogMessageEventArgs : EventArgs
+    {
+        public LogSeverity Severity => default(LogSeverity);
+        public string Source => null;
+        public string Message => null;
+        public Exception Exception => null;
+    }
+}