Merge branch '2.3' into 2.6

* 2.3:
  [FrameworkBundle] Fix title and placeholder rendering in php form templates.
  RequestDataCollector - small fix
  renamed composer.phar to composer to be consistent with the Symfony docs
  [FrameworkBundle] bumped min version of Routing to 2.3
  removed composer --dev option everywhere
  fixed a test
  [Console] Fixed output bug, if escaped string in a formatted string.
  [Security] Remove ContextListener's onKernelResponse listener as it is used
  Revert "minor #12652 [HttpFoundation] [Hackday] #9942 test: Request::getContent() for null value (skler)"
  Revert "fixed assertion"
  fixed assertion
  [HttpFoundation] [Hackday] #9942 test: Request::getContent() for null value
  fixed URL
  Add reference to documentation in FormEvents phpdocs
  [YAML] Fix one-liners to work with multiple new lines
  Keep "pre" meaning for var_dump quick-and-dirty debug
  [Console][Table] Fix cell padding with multi-byte

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/widget_attributes.html.php
	src/Symfony/Bundle/FrameworkBundle/composer.json
	src/Symfony/Component/Console/Helper/TableHelper.php

Author: fabpot

README.md

@@ -76,5 +76,5 @@ Resources
 You can run the unit tests with the following command:
 
     $ cd path/to/Symfony/Component/DependencyInjection/
-    $ composer.phar install
+    $ composer install
     $ phpunit