the navigation bar now disapears and reapears on different pages.
This is controlled by the application_helper.rb
Signup and Login buttons now disapear and reapear depending on the page. This feature is controlled in the appliction helper.
Added some comments in the ApplicationHelper and cleaned up some code
(1) Fixed problems with levels so now the page loads.
(2) Level restriction now appear neatly and only the restriction applied will appear.