Hints per lesson (#314)

Squashing and merging ...

* Each assigment should have the options to have its own set of hints #278

* Updating lessons due to changes from #278

* Enable i18n client side #312

* IDOR move hints to assignment and enable i18n #312

webgoat-container/src/main/resources/static/js/main.js

@@ -18,6 +18,7 @@ require.config({
     backbone: 'libs/backbone-min',
     text: 'libs/text',
     templates: 'goatApp/templates',
+    polyglot: 'libs/polyglot.min'
   },
   shim: {
     underscore: {