basic implementation feature unsubscribe
fixed test and small refactoring
change header List-unsubscribe
use LiipFunctionalTest
add unsubscribeLInk
fixed
refactoring  unsubscribe feature
remove test UnsubscribeController
Merge remote-tracking branch 'remotes/origin/implement_unsubscribe' into v.2.0

* remotes/origin/implement_unsubscribe:
  fixed
  add unsubscribeLInk
  use LiipFunctionalTest
  change header List-unsubscribe
  fixed test and small refactoring
  basic implementation feature unsubscribe

Conflicts:
	src/Stfalcon/Bundle/EventBundle/Command/StfalconMailerCommand.php
	src/Stfalcon/Bundle/EventBundle/Helper/StfalconMailerHelper.php
	src/Stfalcon/Bundle/EventBundle/Resources/config/services.xml
	src/Stfalcon/Bundle/EventBundle/Resources/views/email.html.twig
Fixed bag
Fixed CS
Merge remote-tracking branch 'remotes/origin/unsubscribe_simple' into v.2.0

* remotes/origin/unsubscribe_simple:
  remove test UnsubscribeController
  refactoring  unsubscribe feature

Conflicts:
	src/Application/Bundle/DefaultBundle/Features/Context/FeatureContext.php
Fixed test