ICL: Readme info added.

Author: dmitry-ivanov

README.md

@@ -116,6 +116,33 @@ In progress...
 
 ## Advanced
 
+#### Accessing Monolog instance
+
+This package is using [Monolog](https://packagist.org/packages/monolog/monolog) logging library with all of it's power.
+If needed, you may access the underlying Monolog instance in a two ways:
+
+    - Using `icLogger` command's method:
+    ```php
+    class Foo extends Command
+    {
+        use Loggable;
+    
+        public function handle()
+        {
+            $log = $this->icLogger();
+        }
+    
+        // ...
+    }
+    ```
+
+    - Through Laravel service container:
+    ```php
+    $log = $app('log.iclogger');
+    ```
+
+#### Custom location
+
 Sometimes it's needed to change location of the log files, for example, you want it to be dependent on some command's argument.
 If that is your case, just override `getLogPath` method in your command class: