Merge pull request #296 from tracim/fix/141/frontend_t9n_access

tracim/tracim/templates/master_anonymous.mak

         <link href="${tg.url('/assets/dist/all.css')}" rel="stylesheet">
 
         <script>
-          globalTracimLang = ${h.get_lang()}
+          globalTracimLang = '${h.get_lang()}'
         </script>
     </head>
 

tracim/tracim/templates/master_authenticated.mak

             window.addEventListener("hashchange", shiftWindow);
             function load() { if (window.location.hash) shiftWindow(); }
 
-            globalTracimLang = ${h.get_lang()}
+            globalTracimLang = '${h.get_lang()}'
         </script>
         <link rel="manifest" href="manifest.json?v=0.0.1" />
     </head>

tracim/tracim/templates/master_no_toolbar_no_login.mak

         <![endif]-->
 
         <script>
-          globalTracimLang = ${h.get_lang()}
+          globalTracimLang = '${h.get_lang()}'
         </script>
     </head>