ca: add html
ca: tweak meta and add jQuery to support Bootstrap
ca: add application, routing, controller and template
ca: add routing, controllers and templates for sign in and sign out
ca: add Authentication service skeleton and reference it from controllers and templates
ca: add routeChangeStart handling to enforce authentication
ca: add sign in and sign out forms and skeleton implementations
ca: tweak home template
ca: tweak include syntax
ca: add warn template
ca: remove extra space
ca: add Warn service and reference it from controllers and templates