added form.html.twig  and layout.html.twig for the blog comments and added render method to the show.html.twig to display the comment form on the blog page {id}
added interceptor function __toString
output only the fields the comment form needs
updated createAction - after validation comment controller persist the Comment entity to the database
activate twig dump (Twig_Extension_Debug)
created different routes for GET and POST methods for blog page with comments
output comment count for every blog post
joining the comment table to the blog table, decrease queries
added link to show blog page / comments
added tagcloud to sidebar
added latest comments to sidebar - set parameter for max comments shown in sidebar to config.yml