updated VENDORS for 2.0.19
updated vendors to dev branches
added default configuration for trusted proxies
updated VENDORS for 2.0.20
updated vendors to dev branches
Merge branch '2.0' into 2.1

* 2.0:
  updated vendors to dev branches
  updated VENDORS for 2.0.20
  added default configuration for trusted proxies
  updated vendors to dev branches
  updated VENDORS for 2.0.19

Conflicts:
	app/config/config.yml
	deps.lock
updated VENDORS for 2.1.5
added a warning about a security issue when using the _internal route
Merge branch '2.0' into 2.1

* 2.0:
  added a warning about a security issue when using the _internal route
updated VENDORS for 2.1.6
fixed 2.1.6 composer.lock file
Add description about the upgrade of app/appKernel.php
Merge branch '2.1' of git://github.com/symfony/symfony-standard into 2.1