Replace log4net by custom logger (#94) (#96)

* Replace log4net by custom logger

* WireMockNullLogger

src/WireMock.Net/Logging/WireMockNullLogger.cs

@@ -0,0 +1,29 @@
+namespace WireMock.Logging
+{
+    /// <summary>
+    /// WireMockNullLogger which does not log.
+    /// </summary>
+    /// <seealso cref="IWireMockLogger" />
+    public class WireMockNullLogger : IWireMockLogger
+    {
+        /// <see cref="IWireMockLogger.Debug"/>
+        public void Debug(string formatString, params object[] args)
+        {
+        }
+
+        /// <see cref="IWireMockLogger.Info"/>
+        public void Info(string formatString, params object[] args)
+        {
+        }
+
+        /// <see cref="IWireMockLogger.Warn"/>
+        public void Warn(string formatString, params object[] args)
+        {
+        }
+
+        /// <see cref="IWireMockLogger.Error"/>
+        public void Error(string formatString, params object[] args)
+        {
+        }
+    }
+}