fixed hebrew language string and introducing fallback to english if wrong language is set

public/language/he/language.json

@@ -1,4 +1,4 @@
 {
     "name": "עברית (ישראל)",
-    "code": "he_IL"
+    "code": "he"
 }

public/src/translator.js

@@ -201,9 +201,15 @@
 			Meta = require('../../src/meta'),
 			path = require('path'),
 			fs = require('fs'),
-			winston = require('winston');
+			winston = require('winston'),
+			language = Meta.config.defaultLang;
 
-		utils.walk(path.join(__dirname, '../language', (Meta.config.defaultLang || 'en_GB')), function (err, data) {
+		if (!fs.existsSync(path.join(__dirname, '../language', language))) {
+			winston.warn('[translator] Language \'' + Meta.config.defaultLang + '\' not found. Defaulting to \'en_GB\'');
+			language = 'en_GB';
+		}
+
+		utils.walk(path.join(__dirname, '../language', language), function (err, data) {
 			var loaded = data.length;
 
 			for (var d in data) {