Renaming getEntityManager to getManager

Doctrine getEntityManager function is now depricated and replaced by getManager,
updated all getEntityManager calls.
Renaming bindRequest to bind

bindRequest() is deprecated since version 2.1 and will be removed in 2.3. Use FormConfigInterface::bind() instead
Add route for render calls

An exception has been thrown during the rendering of a template ("No route found for "GET Comment:new"") in BloggerBlogBundle:Blog:show.html.twig at line 24.
Same for Chapter 5
Merge pull request #12 from nickvergessen/patch-4

Patch 4 Symfony 2.2+ adjustments