anchor.diff:  The Flash class is automatically available in the template so you don't
   have to pass the class to the template via a controller.
   
  -=== Authentication
  +== Authentication
   
   mangoo I/O comes with two authentication implementations out of the box: HTTP Basic
   authentication and custom authentication where you have a custom login
   and authentication process ready to use.
   
  -==== Basic authentication
  +=== Basic authentication
   
   The HTTP Basic authentication in mangoo I/O uses a predefined filter:
   BasicAuthenticationFilter.class. So the first step to enable Basic
  
positive.code: }
  --------------------------------------------------------
  
  == Routing
  
  One of the main pieces of a mangoo I/O application is the mapping of
  requests URLs to controllers classes and their methods. Whether you are rendering a
  
negative.code: If the token is invalid the request will be redirected to a default
  403 Forbidden page.
  
  == Sessions
  
  With a http://en.wikipedia.org/wiki/Shared_nothing_architecture[Shared
  nothing architecture] in mind mangoo I/O uses a so called client-side
  