CC-1960: Internationalize Airtime / Support translations

-added i18n jquery library
-created a Locale controller that returns a js dictionary of translations needed in js
-added jquery i18n wrapper function to all strings in js

airtime_mvc/public/js/airtime/showbuilder/main_builder.js

@@ -15,7 +15,7 @@ AIRTIME = (function(AIRTIME) {
         timeStartId = "#sb_time_start",
         dateEndId = "#sb_date_end",
         timeEndId = "#sb_time_end",
-        $toggleLib = $("<a id='sb_edit' class='btn btn-small' href='#' title='Open library to add or remove content'>Add / Remove Content</a>"),
+        $toggleLib = $("<a id='sb_edit' class='btn btn-small' href='#' title='"+$.i18n._("Open library to add or remove content")+"'>"+$.i18n._("Add / Remove Content")+"</a>"),
         $libClose = $('<a />', {
             "class": "close-round",
             "href": "#",