Add: App: display comments via nested set extension
Add: Console: display comments list in console
Add: Console: output tree to file as json
Fix: App: redirect after add comment
Refactor: App: routes, actions for comment
Refactor: App: controller name
Add: View: text message when no comments exists
Add: Security: redirect admin to admin area after login
Add: App: deleting comment
Change: View: text for deleted comment