Language update

Added different level of language preference functionaloty which can be
set from the new option in top navigation bar
Lanaguage preference can be set as
* System language (Default for all users)
* Session based   (User who are not logged in and want to see they
system in language of their choice can set their preference in browser
session)
* User lever (for authenticated users who have updated their language
preference, system will change into their selected language when they
log into the system)

public/lb-faveo/js/languagechanger.js

@@ -0,0 +1,3 @@
+function changeLang(lang) {
+    location.href = "swtich-language/"+lang;
+}