Update configuration and example

Php-parallel-lint-plugin.md

@@ -1,11 +1,14 @@
 Similar to the [standard PHP Lint plugin](https://github.com/Block8/PHPCI/wiki/Lint-plugin), except that it uses the [PHP Parallel Lint](https://github.com/JakubOnderka/PHP-Parallel-Lint) project to run.
 
-###Example:
+## Configuration
+### Options
+* **directory** [optional] - directory to inspect (default: build root)
+* **ignore** [optional] - directory to ignore (default: inherits ignores specified in setup)
 
+### Example
 ```
 test:
   php_parallel_lint:
-    directory:
-      - "app"
-      - "public"
-```
+    directory: "app"
+    ignore: "test"
+```