Added comments

PHPCI/Plugin/PhpUnit.php

@@ -7,11 +7,15 @@ class PhpUnit implements \PHPCI\Plugin
 	protected $directory;
 	protected $args;
 	protected $phpci;
+	
+	/**
+	 * @var string $runFrom When running PHPUnit with an XML config, the command is run from this directory
+	 */
 	protected $runFrom;
 
-/**
- * @var string $xmlConfigFile The path of an xml config for PHPUnit
- */
+	/**
+	 * @var string $xmlConfigFile The path of an xml config for PHPUnit
+	 */
 	protected $xmlConfigFile;
 
 	public function __construct(\PHPCI\Builder $phpci, array $options = array())

README.md

@@ -87,6 +87,7 @@ Similar to Travis CI, to support PHPCI in your project, you simply need to add a
 				- "PHPUnit-ubuntu-fix.xml"
 			directory:
 				- "tests/"
+			run_from: "phpunit/"
     	php_mess_detector:
     		allow_failures: true
     	php_code_sniffer: