made path to the config_loader.php relative to __dirname for unit tes…

…ting.

lib/config.js

@@ -5,7 +5,7 @@ var Config = module.exports;
 
 Config.init = function (config, callback) {
 	if (typeof config === "string") {
-		exec('php node_modules/node-joomla/config_loader.php ' + config,
+		exec('php ' + __dirname + '/../config_loader.php ' + config,
 	    function (error, stdout, stderr) {
 	      if(error) {
 	        console.log('PHP Error: ' + error.message);