Add getUser() function

Useful to add active user name in log path

lib/logWriter.js

@@ -90,6 +90,37 @@
         }
     };
 
+    /**
+     * LogWriter.prototype.getUser
+     *
+     * Tool, return active user
+     *
+     * @return {String}
+     */
+    LogWriter.prototype.getUser = function () {
+
+        var user = '';
+
+        try {
+
+            var platformKey     = process.platform === 'win32' ? 'USERPROFILE' : 'HOME',
+                platformDivider = process.platform === 'win32' ? '\\' : '/';
+
+
+            var userDir = process.env[platformKey].toLowerCase();
+            user = userDir.slice(userDir.lastIndexOf(platformDivider) + 1);
+
+        } catch (e) {
+            
+            user = 'user'; //default
+
+        } finally {
+            
+            return user;
+
+        }
+    };
+
     /**
      * LogWriter.prototype.getPath
      *