#9 - User can not send message to himself.
#10 - Added new CommentController with methods addComment and deleteComment.
#10 - removed methods available in CommentController from PostController.
#14 - Updated SidebarPreparer - works only at pages with sidebar.
#12 - Updated PostDao contract - added method for selecting the most rated posts.
#12 - Updated PostDaoImpl according to new version of interface.
#12 - SidebarPreparer passes to sidebar.jsp list the most rated posts instead of recent posts.