Add documentation on how to integrate fosuser and fosfacebookuser providers
Fix markdown typo
Fixes providers order
Formatting of paragraph "Include the login button in your templates"
Syntax highlighting for paragraph "Setting up the JavaScript SDK"
use html+jinja for Twig syntax highlighting
Use html+jinja for Twig syntax highlighting
Creating an option to avoid be redirect to facebook login
Lazy start the session. Refs #179
Fixed bad state persistence
Fix default state value
Removing LogoutHandler

LogoutHandler it's useless to deal with the logout for Facebook apps.
It's better to do it using the Javascript SDK (Facebook JS-SDK)
also allow 2.2
Fixed configuration for new PHP Facebook path
Update README.md
Update README.md

getFirstName -> getFirstname
Fix coding standards
Fix code convention (PSR2)
Update README.md

path to base_facebook.php fix from 
file="%kernel.root_dir%/../vendor/facebook/src/base_facebook.php"
to
file="%kernel.root_dir%/../vendor/facebook/php-sdk/src/base_facebook.php"
Fix the README numeration and code highlighting